●

PennyRail

Compute ✓ VERIFIED

delivery-verified 2026-08-31 · no expiry, revoked only on payTo or schema drift

Tiny deterministic pay-per-call utilities for autonomous agents: text, JSON, URL, encoding, validation, numeric, time, and public-data operations settled with x402 USDC on Base.

Pay from $0.001 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-08-31 (start of our harvest window) · $0.02 all-time · settled via coinbase

paid probe: delivered (HTTP 200) on 2026-08-31

BASE URL https://pennyrail.vercel.app │ WEBSITE https://pennyrail.vercel.app │ ENDPOINTS 50 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-08-31 │ MONITORED SINCE 2026-08-31

VERDICT

ranking generation 3

solid 87/100 #2 of 14 in Compute by measured score

What the score read on this service: status online, 100% uptime 30d, 469ms response p95, x402 compliance 14 of 14, $0.001 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside Compute, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 14 listings, this one among them. That set is wider than the 14 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN COMPUTE

Other Compute services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE	BAND	SCORE	UPTIME 30D	VOL 30D
QuickNode	solid	89	100%	$0
Cloud World Model	solid	86	100%	$0.57
Coprocesseur déterministe	solid	86	99.9%	$0.01
agent-exec	solid	86	100%	$0
WAKE402	solid	85	100%	$0.26

5 of 13 other ranked services in Compute · see the whole category

ASSESSMENT

updated 2h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 100%

uptime 24h: 100%
uptime 7d: 100%
uptime 30d: 100%
uptime 90d: 100%
response p95: 469ms
avg response: 282ms
total checks: 24

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 (p29 in Compute)

price (min): $0.001
category percentile (min): p29 in Compute
endpoints / prices: 50 / 1
model: flat
stability: 100%

risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age: -
registrar: -
hosting: free host
domain created: ---

Identity facts, not a risk score.

traction $0.037 30d · 2 buyers · top buyer 97%

volume 30d: $0.037
buyers 30d: 2
settlements 30d: 9
measured since: 2026-08-31 (start of our harvest window)
last settlement: 2026-08-31
top buyer share: 97% of 30d volume
trend 7d vs 30d: 4.29x the 30d daily rate
networks: eip155:8453
volume all-time: $0.02
settlements all-time: 2
median settlement 30d: $0.001
max settlement 30d: $0.02
settled via: coinbase ($0.04, 9 tx)

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	PRICE	NETWORK	ASSET	402 CHANNEL
POST	/api/f/country.lookup	$0.001	Base	USDC	header
POST	/api/f/crypto.sha256	$0.001	Base	USDC	header
POST	/api/f/dns.a	$0.001	Base	USDC	header
POST	/api/f/encoding.base64-decode	$0.001	Base	USDC	header
POST	/api/f/encoding.base64-encode	$0.001	Base	USDC	header
POST	/api/f/encoding.hex-decode	$0.001	Base	USDC	header
POST	/api/f/encoding.hex-encode	$0.001	Base	USDC	header
POST	/api/f/encoding.url-decode	$0.001	Base	USDC	header
POST	/api/f/encoding.url-encode	$0.001	Base	USDC	header
POST	/api/f/fx.convert	$0.001	Base	USDC	header
POST	/api/f/github.repo	$0.001	Base	USDC	header
POST	/api/f/json.flatten	$0.001	Base	USDC	header
POST	/api/f/json.get	$0.001	Base	USDC	header
POST	/api/f/json.keys	$0.001	Base	USDC	header
POST	/api/f/json.omit	$0.001	Base	USDC	header
POST	/api/f/json.pick	$0.001	Base	USDC	header
POST	/api/f/json.sort-keys	$0.001	Base	USDC	header
POST	/api/f/npm.latest	$0.001	Base	USDC	header
POST	/api/f/number.clamp	$0.001	Base	USDC	header
POST	/api/f/number.percent-change	$0.001	Base	USDC	header
POST	/api/f/number.round	$0.001	Base	USDC	header
POST	/api/f/number.stats	$0.001	Base	USDC	header
POST	/api/f/number.sum	$0.001	Base	USDC	header
POST	/api/f/text.char-count	$0.001	Base	USDC	header
POST	/api/f/text.extract-emails	$0.001	Base	USDC	header
POST	/api/f/text.extract-urls	$0.001	Base	USDC	header
POST	/api/f/text.lines-dedupe	$0.001	Base	USDC	header
POST	/api/f/text.lines-sort	$0.001	Base	USDC	header
POST	/api/f/text.lowercase	$0.001	Base	USDC	header
POST	/api/f/text.normalize-whitespace	$0.001	Base	USDC	header
POST	/api/f/text.remove-empty-lines	$0.001	Base	USDC	header
POST	/api/f/text.reverse	$0.001	Base	USDC	header
POST	/api/f/text.slugify	$0.001	Base	USDC	header
POST	/api/f/text.truncate	$0.001	Base	USDC	header
POST	/api/f/text.uppercase	$0.001	Base	USDC	header
POST	/api/f/text.word-frequency	$0.001	Base	USDC	header
POST	/api/f/time.diff-seconds	$0.001	Base	USDC	header
POST	/api/f/time.to-iso	$0.001	Base	USDC	header
POST	/api/f/time.to-unix	$0.001	Base	USDC	header
POST	/api/f/url.domain	$0.001	Base	USDC	header
POST	/api/f/url.json-to-query	$0.001	Base	USDC	header
POST	/api/f/url.normalize	$0.001	Base	USDC	header
POST	/api/f/url.parse	$0.001	Base	USDC	header
POST	/api/f/url.query-to-json	$0.001	Base	USDC	header
POST	/api/f/url.resolve	$0.001	Base	USDC	header
POST	/api/f/validation.email	$0.001	Base	USDC	header
POST	/api/f/validation.uuid	$0.001	Base	USDC	header
POST	/api/tools/json-canonicalize	$0.001	Base	USDC	header
GET	/api/tools/strip-tracking	$0.001	Base	USDC	header
GET	/api/tools/text-stats	$0.001	Base	USDC	header

50 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/tools/strip-tracking returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i 'https://pennyrail.vercel.app/api/tools/strip-tracking'

// 402 response (captured by monitor) · 50 payloads · click to expand

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/tools/json-canonicalize",
      "mimeType": "application/json",
      "description": "Canonicalize JSON by recursively sorting object keys."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/tools/text-stats",
      "mimeType": "application/json",
      "description": "Deterministic text counts: characters, words, sentences, estimated reading seconds."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/tools/strip-tracking",
      "mimeType": "application/json",
      "description": "Remove common advertising/tracking query parameters from an absolute URL."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.normalize-whitespace",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.slugify",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.lines-dedupe",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.lines-sort",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.extract-emails",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.extract-urls",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.word-frequency",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.truncate",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/json.flatten",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/json.get",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/json.keys",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/json.sort-keys",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/url.parse",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/url.normalize",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/url.resolve",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/url.query-to-json",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/url.json-to-query",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/number.stats",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/number.percent-change",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/number.clamp",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/time.to-iso",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/time.to-unix",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/encoding.base64-encode",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/encoding.base64-decode",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/encoding.hex-encode",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/encoding.hex-decode",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/crypto.sha256",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/dns.a",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/npm.latest",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/github.repo",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/fx.convert",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/country.lookup",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.lowercase",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.uppercase",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.reverse",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.remove-empty-lines",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.char-count",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/json.pick",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/json.omit",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/url.domain",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/number.round",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/number.sum",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/time.diff-seconds",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/encoding.url-encode",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/encoding.url-decode",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/validation.email",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/validation.uuid",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 7d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/pennyrail/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME

7d UPTIME 100%

RESPONSE TIME

AVG RESP 289ms

PRICE (captured 402, USD)

Median across 50 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

price percentile in Compute

site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-31 · last up 2026-09-01

402 payload captured
accepts[] array present
payTo address recoverable
payTo at accepts[0].payTo (conformant shape)
payTo is a valid on-chain address
atomic price declared
atomic price in a sane range
asset (token) address declared
network resolves to CAIP-2
payment scheme declared
served over HTTPS
declares the current x402 version (2)
EIP-712 domain parameters present on every EVM entry
x402 v2 envelope delivered in the payment-required header

SITE PILLARS

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

recent checks (18) live · click to expand

TIME STATUS RESP CAUSE

01:28:19 UTC ● OK 337ms

01:12:14 UTC ● OK 272ms

00:56:21 UTC ● OK 281ms

00:40:22 UTC ● OK 362ms

00:24:29 UTC ● OK 389ms

00:08:18 UTC ● OK 258ms

23:52:21 UTC ● OK 293ms

23:36:31 UTC ● SLOW 458ms

23:20:33 UTC ● SLOW 540ms

23:04:25 UTC ● OK 389ms

22:48:08 UTC ● OK 66ms

22:32:09 UTC ● OK 187ms

22:16:21 UTC ● OK 271ms

22:00:24 UTC ● OK 313ms

21:44:28 UTC ● OK 378ms

21:28:26 UTC ● OK 365ms

21:12:29 UTC ● OK 395ms

20:56:24 UTC ● OK 381ms

EMBED THIS BADGE

Show that PennyRail is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

status

PennyRail uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/pennyrail?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/pennyrail.svg" alt="PennyRail listed on x402-list" height="28">
</a>

// Markdown

[![PennyRail on x402-list](https://x402-list.com/badge/pennyrail.svg)](https://x402-list.com/services/pennyrail?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/pennyrail?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/pennyrail.svg?data=uptime" alt="PennyRail uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

To request delisting, email info@x402-list.com or update your listing at /services/pennyrail/update.