x402 census · agent402.tools · 944de295ef40 · JSON

POST /v1/messages

live

Anthropic Messages API over x402 - point the Anthropic SDK (or Claude Code / the Agent SDK) at base_url https://agent402.tools/v1 and pay $0.02 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Messages wire (Claude natively, others translated). Depth: `effort` (low..max) on Claude 4.7+, thinking.budge…

Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.

Facts from the catalogs

Field Value

URL https://agent402.tools/v1/messages

Method POST

Price $0.02 USDC = 20000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base); also accepts eip155:137, eip155:42161, eip155:143, eip155:43114, eip155:1329, eip155:10, eip155:4663, eip155:42220, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, stellar:pubnet, algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=

payTo 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0

Seller agent402.tools

Catalogs cdp (row updated 2026-09-22)

Listed since (lower bound) 2026-09-22 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-09-22

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-09-22 (catalog-reported, not verified on chain)

Category (keyword rule) inference/llm

Templated path no

x402Version in catalog 2

Service name / tags Messages base · llm, ai, inference, anthropic-compatible, messages-api

Unpaid probe (census of 2026-09-30)

Field Value

Probed at 2026-09-30T23:53:53.199Z

HEAD 402

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in body

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"20000","payTo":"0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Live payTo equals catalog payTo yes

extensions.bazaar in the 402 yes

PAYMENT-REQUIRED header no

WWW-Authenticate offer Payment id="bidpDjKl1UOP_xQhP25rQ8xGv5sW

Content type / server / CORS application/json / railway-hikari / *

Latency 1,410 ms

Error Payment required

No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.

On-chain facts for the payTo (public address)

Field Value

Distinct payers 120

Payments 1,253

USDC volume $12.29

Median payment $0.003

First / last payment 2026-06-18 / 2026-09-30

Sampler-shaped share of payments 61.8%

Payers that are not samplers 2

Source forensics-2026-09-30

Address 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0 (contract: EIP7702StatelessDeleGator)

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "max_tokens": 256,
   "messages": [
    {
     "content": "Summarize x402 in one sentence.",
     "role": "user"
    }
   ],
   "model": "anthropic/claude-haiku-4.5"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "content": [
    {
     "text": "x402 is an HTTP-native way for agents to pay per request with USDC.",
     "type": "text"
    }
   ],
   "id": "msg_…",
   "model": "anthropic/claude-sonnet-5",
   "role": "assistant",
   "stop_reason": "end_turn",
   "type": "message",
   "usage": {
    "input_tokens": 14,
    "output_tokens": 18
   }
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://agent402.tools/v1/messages' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'

The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.

Paid checks (x402, USDC on Base)

GET https://bazaar.agentexchange.work/r/944de295ef40/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"944de295ef40"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.

Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on agent402.tools.