x402 List

x402 Protocol Service Directory

Content Intelligence API

Content PAYMENT-READY imported

payment-ready until 2026-09-11

imported from the x402 Bazaar, not submitted by the operator · own this service? claim it · or ask to be removed

Web content API: extracts clean text, metadata and links from a URL, and returns AI summary, sentiment, topics, named entities and content type as structured JSON. Priced per call in USDC on Base or Solana.

Part of the Hugen operator hub

Pay from $0.01 to $0.02 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

BASE URL https://content.hugen.tokyo ENDPOINTS 2 NETWORK Base / Solana ASSET USDC MEMBER SINCE 2026-07-20 MONITORED SINCE 2026-07-20

VERDICT

ranking generation 3

strong 95/100 #8 of 31 in Content by measured score

What the score read on this service: status online, 100% uptime 30d, 1412ms response p95, x402 compliance 14 of 14, $0.01 price against the category. 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 Content, 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 31 listings, this one among them. That set is wider than the 31 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 CONTENT

Other Content 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
penny402 strong 98 100% ---
Busker strong 98 100% ---
Skim strong 98 99.9% ---
21millionpixels.art strong 97 100% ---
ForgeMesh Library strong 97 100% ---
5 of 30 other ranked services in Content · 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
1412ms
avg response
779ms
total checks
2,718

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 $0.01 to $0.02 (p40 in Content)
price (min)
$0.01
price (max)
$0.02
category percentile (min)
p40 in Content
category percentile (max)
p34 in Content
endpoints / prices
2 / 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 ---

This service settles on a network x402-list does not measure yet, so on-chain volume is not counted here. Shown as unmeasured, not zero.

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 DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
GET /content/analyze $0.02 Base/Solana USDC header
GET /content/extract $0.01 Base/Solana USDC header
2 endpoints

REQUEST / RESPONSE EXAMPLE

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

// request
curl -i 'https://content.hugen.tokyo/content/analyze'
// 402 response (captured by monitor) · 2 payloads · click to expand
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "4du4AfkjJEwch2zk3shkPJVZfyJHNDnNjEWC6AboaS5Z",
        "amount": "20000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://content.hugen.tokyo/content/analyze",
      "mimeType": "application/json",
      "description": "Comprehensive AI content analysis — sentiment scoring (-1.0 to 1.0), topic classification, named entity extraction, content type detection (news/blog/docs/tutorial), and credibility assessment. Returns structured analysis ready for immediate use. No LLM integration needed. Accepts USDC payments on Base and Solana"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "url": "https://example.com/article"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "summary": "...",
              "sentiment": {
                "label": "positive",
                "score": 0.7
              },
              "content_type": "news"
            }
          }
        },
        "tags": [
          "web",
          "extract",
          "summary",
          "ai"
        ],
        "schema": {
          "properties": {
            "input": {
              "required": [
                "method"
              ]
            }
          }
        },
        "category": "content-extraction",
        "discoverable": true
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "4du4AfkjJEwch2zk3shkPJVZfyJHNDnNjEWC6AboaS5Z",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://content.hugen.tokyo/content/extract",
      "mimeType": "application/json",
      "description": "Extract clean, readable text from any web page — removes navigation, ads, scripts, and boilerplate. Dual-engine extraction with JS-rendered page fallback for SPAs and dynamic content. Returns content with title, author, word count, language, and reading time. No headless browser or scraping library needed. Accepts USDC payments on Base and Solana"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "url": "https://example.com/article"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "title": "OpenAI Launches GPT-5 with Advanced Reasoning",
              "author": "John Smith",
              "content": "OpenAI announced GPT-5 today, marking a significant leap in reasoning capabilities. The model demonstrates improved performance across mathematical reasoning, coding, and scientific analysis benchmarks...",
              "language": "en",
              "word_count": 1250,
              "reading_time_minutes": 5
            }
          }
        },
        "tags": [
          "web",
          "extract",
          "summary",
          "ai"
        ],
        "schema": {
          "properties": {
            "input": {
              "required": [
                "method"
              ]
            }
          }
        },
        "category": "content-extraction",
        "discoverable": true
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/content-intelligence-api/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
08-06 · uptime 100.0% · 853ms avg08-07 · uptime 100.0% · 713ms avg08-08 · uptime 100.0% · 716ms avg08-09 · uptime 100.0% · 634ms avg08-10 · uptime 100.0% · 694ms avg08-11 · uptime 100.0% · 832ms avg08-12 · uptime 100.0% · 711ms avg08-13 · uptime 100.0% · 1209ms avg08-14 · uptime 100.0% · 701ms avg08-15 · uptime 100.0% · 767ms avg08-16 · uptime 100.0% · 991ms avg08-17 · uptime 100.0% · 977ms avg08-18 · uptime 100.0% · 884ms avg08-19 · uptime 100.0% · 820ms avg08-20 · uptime 100.0% · 687ms avg08-21 · uptime 100.0% · 650ms avg08-22 · uptime 100.0% · 615ms avg08-23 · uptime 100.0% · 550ms avg08-24 · uptime 100.0% · 608ms avg08-25 · uptime 100.0% · 840ms avg08-26 · uptime 100.0% · 779ms avg08-27 · uptime 100.0% · 894ms avg08-28 · uptime 100.0% · 752ms avg08-29 · uptime 100.0% · 770ms avg08-30 · uptime 100.0% · 568ms avg08-31 · uptime 100.0% · 772ms avg09-01 · uptime 100.0% · 873ms avg09-02 · uptime 100.0% · 925ms avg09-03 · uptime 100.0% · 862ms avg09-04 · uptime 100.0% · 612ms avg08-0609-04
30d UPTIME 100%
RESPONSE TIME
08-06 · 853ms avg08-06 · 853ms avg08-07 · 713ms avg08-07 · 713ms avg08-08 · 716ms avg08-08 · 716ms avg08-09 · 634ms avg08-09 · 634ms avg08-10 · 694ms avg08-10 · 694ms avg08-11 · 832ms avg08-11 · 832ms avg08-12 · 711ms avg08-12 · 711ms avg08-13 · 1209ms avg08-13 · 1209ms avg08-14 · 701ms avg08-14 · 701ms avg08-15 · 767ms avg08-15 · 767ms avg08-16 · 991ms avg08-16 · 991ms avg08-17 · 977ms avg08-17 · 977ms avg08-18 · 884ms avg08-18 · 884ms avg08-19 · 820ms avg08-19 · 820ms avg08-20 · 687ms avg08-20 · 687ms avg08-21 · 650ms avg08-21 · 650ms avg08-22 · 615ms avg08-22 · 615ms avg08-23 · 550ms avg08-23 · 550ms avg08-24 · 608ms avg08-24 · 608ms avg08-25 · 840ms avg08-25 · 840ms avg08-26 · 779ms avg08-26 · 779ms avg08-27 · 894ms avg08-27 · 894ms avg08-28 · 752ms avg08-28 · 752ms avg08-29 · 770ms avg08-29 · 770ms avg08-30 · 568ms avg08-30 · 568ms avg08-31 · 772ms avg08-31 · 772ms avg09-01 · 873ms avg09-01 · 873ms avg09-02 · 925ms avg09-02 · 925ms avg09-03 · 862ms avg09-03 · 862ms avg09-04 · 612ms avg09-04 · 612ms avg08-0609-04
AVG RESP 779ms
PRICE (captured 402, USD)
08-05 · $0.01509-04 · $0.015$0.01508-0509-04

Median across 2 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-05 uptime: 100.0% compliance: 100% checks08-06 uptime: 100.0% compliance: 100% checks08-07 uptime: 100.0% compliance: 100% checks08-08 uptime: 100.0% compliance: 100% checks08-09 uptime: 100.0% compliance: 100% checks08-10 uptime: 100.0% compliance: 100% checks08-11 uptime: 100.0% compliance: 100% checks08-12 uptime: 100.0% compliance: 100% checks08-13 uptime: 100.0% compliance: 100% checks08-14 uptime: 100.0% compliance: 100% checks08-15 uptime: 100.0% compliance: 100% checks08-16 uptime: 100.0% compliance: 100% checks08-17 uptime: 100.0% compliance: 100% checks08-18 uptime: 100.0% compliance: 100% checks08-19 uptime: 100.0% compliance: 100% checks08-20 uptime: 100.0% compliance: 100% checks08-21 uptime: 100.0% compliance: 100% checks08-22 uptime: 100.0% compliance: 100% checks08-23 uptime: 100.0% compliance: 100% checks08-24 uptime: 100.0% compliance: 100% checks08-25 uptime: 100.0% compliance: 100% checks08-26 uptime: 100.0% compliance: 100% checks08-27 uptime: 100.0% compliance: 100% checks08-28 uptime: 100.0% compliance: 100% checks08-29 uptime: 100.0% compliance: 100% checks08-30 uptime: 100.0% compliance: 100% checks08-31 uptime: 100.0% compliance: 100% checks09-01 uptime: 100.0% compliance: 100% checks09-02 uptime: 100.0% compliance: 100% checks09-03 uptime: 100.0% compliance: 100% checks09-04 uptime: 100.0% compliance: 100% checksuptimecompliance08-0509-04

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

PILLARS OVER TIME (measured)

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)
This service settles on a network x402-list does not measure yet, so on-chain volume is not counted here. Shown as unmeasured, not zero.
DISTINCT BUYERS
This service settles on a network x402-list does not measure yet, so distinct on-chain buyers are not counted here. Shown as unmeasured, not zero.

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-07-20 · last up 2026-09-04

  • 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
● OK 571ms
● OK 1040ms
● OK 630ms
● OK 856ms
● OK 636ms
● OK 743ms
● OK 584ms
● OK 877ms
● OK 597ms
● OK 648ms
● OK 581ms
● OK 665ms
● OK 461ms
● OK 577ms
● OK 490ms
● OK 623ms
● OK 679ms
● OK 534ms

EMBED THIS BADGE

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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 ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

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