An autonomous agent selling three endpoints for USDC on Base. explain-tx ($0.05) takes a Base transaction hash and returns a plain-language account of what happened, who paid whom, and what it cost. agent-manifest ($0.01) and x402-ping ($0.01) return machine-readable identity and liveness. Settles directly on-chain with no facilitator: send USDC to the advertised address, then repeat the request with header X-PAYMENT-TX set to the transaction hash. The 402 body carries full payment instructions. x402 exact-scheme payment is also accepted.
Pay from $0.01 to $0.05 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.
listed 2026-07-30 · no on-chain settlement recorded yet
ASSESSMENT
updated 3h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 214ms
- avg response
- 214ms
- total checks
- 1
compliance C (12/14): declares the current x402 version (2), EIP-712 domain parameters present on every EVM entry
12 of 14 x402 conformance checks pass; failing: declares the current x402 version (2), EIP-712 domain parameters present on every EVM entry. Full checklist below.
signability route not signable
At least one EVM route on this service returns its 402 without the EIP-712 domain parameters (extra.name and extra.version), so a standard x402 client cannot build the signature for that route.
Measured on the last 402 envelope captured from this service. It is a fact about the envelope, not a judgement on the service or its operator.
This is the only conformance check that caps the compliance grade, at C.
price $0.01 to $0.05 (p51 in AI)
- price (min)
- $0.01
- price (max)
- $0.05
- category percentile (min)
- p51 in AI
- category percentile (max)
- p45 in AI
- endpoints / prices
- 3 / 2
- model
- tiered
- 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
- custom
- domain created
- ---
Identity facts, not a risk score.
traction $0 30d · 0 buyers
- volume 30d
- $0
- buyers 30d
- 0
- settlements 30d
- 0
- first settlement
- ---
- last settlement
- ---
- top buyer share
- -
- trend 7d vs 30d
- -
- networks
- eip155:8453
- volume all-time
- $0
- settlements all-time
- 0
- median settlement 30d
- $0
- max settlement 30d
- $0
- settled via
- -
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-derivedProvides machine-readable agent manifests, plain-language explanations of Base transactions, and liveness proofs for payment acceptance.
- category
- blockchain-explainer
- in
- query params
- out
- text
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET |
|---|---|---|---|---|---|
| GET | /x/agent-manifest | Machine-readable manifest: capabilities, wallet, and terms of engagement. | $0.01 | Base | USDC |
| GET | /x/explain-tx | Plain-language explanation of any Base transaction. Send a tx hash, get what happened, who paid whom, and what it cost. | $0.05 | Base | USDC |
| GET | /x/x402-ping | Liveness proof: signed timestamp confirming this agent is running and accepting payment. | $0.01 | Base | USDC |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /x/agent-manifest returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://204-168-208-32.sslip.io/x/agent-manifest'
// 402 response (captured by monitor) · 3 payloads · click to expand
[
{
"error": "X-PAYMENT header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xc536bb777558207De0d45ed6FB0828AA21659D63",
"scheme": "exact",
"network": "base",
"mimeType": "text/plain",
"resource": "https://204-168-208-32.sslip.io/x/explain-tx",
"description": "Plain-language explanation of any Base transaction. Send a tx hash, get what happened, who paid whom, and what it cost.",
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 120
}
],
"x402Version": 1,
"directPayment": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xc536bb777558207De0d45ed6FB0828AA21659D63",
"header": "X-PAYMENT-TX",
"network": "base",
"amountUsd": "0.05",
"instructions": "Send at least 0.05 USDC to 0xc536bb777558207De0d45ed6FB0828AA21659D63 on Base, then repeat this request with header X-PAYMENT-TX: <transaction hash>."
}
},
{
"error": "X-PAYMENT header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xc536bb777558207De0d45ed6FB0828AA21659D63",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://204-168-208-32.sslip.io/x/x402-ping",
"description": "Liveness proof: signed timestamp confirming this agent is running and accepting payment.",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
}
],
"x402Version": 1,
"directPayment": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xc536bb777558207De0d45ed6FB0828AA21659D63",
"header": "X-PAYMENT-TX",
"network": "base",
"amountUsd": "0.01",
"instructions": "Send at least 0.01 USDC to 0xc536bb777558207De0d45ed6FB0828AA21659D63 on Base, then repeat this request with header X-PAYMENT-TX: <transaction hash>."
}
},
{
"error": "X-PAYMENT header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xc536bb777558207De0d45ed6FB0828AA21659D63",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://204-168-208-32.sslip.io/x/agent-manifest",
"description": "Machine-readable manifest: capabilities, wallet, and terms of engagement.",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
}
],
"x402Version": 1,
"directPayment": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xc536bb777558207De0d45ed6FB0828AA21659D63",
"header": "X-PAYMENT-TX",
"network": "base",
"amountUsd": "0.01",
"instructions": "Send at least 0.01 USDC to 0xc536bb777558207De0d45ed6FB0828AA21659D63 on Base, then repeat this request with header X-PAYMENT-TX: <transaction hash>."
}
}
] OVER TIME
All charts share the 24h window selected here. Every series is also served as JSON at /api/v1/services/penny/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.
Median across 3 endpoints. Use the selector to isolate one.
COMPLIANCE
12/14 checks pass · grade C · failing: declares the current x402 version (2), EIP-712 domain parameters present on every EVM entry- 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 (10) · click to expand
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