Agent Exchange x402 census and directory

x402 census · mcp.onchaindiligence.com · 7f87666c9821 · JSON

POST /x402/preflight-payment

unprobed

Evaluate a proposed payment against a structured, caller-supplied policy and optional recipient sanctions screening, before execution. Returns ALLOW, REQUIRE_APPROVAL, or BLOCK with reasons, plus a signed OCD PREFLIGHT receipt anyone can independently verify. Policy evaluation only: OCD never holds, moves, or authorizes funds. The wallet, PayBox, or x402 client independently authorizes execution …

Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.

Facts from the catalogs

FieldValue
URLhttps://mcp.onchaindiligence.com/x402/preflight-payment
MethodPOST
Price$0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Networkeip155:8453 (base)
payTo0x63c347d7e42b940e79AfEC3D172bFc2921b6c897
Sellermcp.onchaindiligence.com
Catalogscdp (row updated 2026-09-28)
Listed since (lower bound)2026-09-28 (earliest catalog timestamp; catalogs report last-update times only)
Last catalog update2026-09-28
CDP quality counters3 calls and 3 unique payers in 30 days, last call 2026-09-28 (catalog-reported, not verified on chain)
Category (keyword rule)identity/trust/kyc
Templated pathno
x402Version in catalog2
Service name / tagsOnChainDiligence · payment-preflight, agent-payments, policy, authorization, usdc

Unpaid probe (census of )

FieldValue
Probenot probed in this build

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)

FieldValue
Settlement historyunresolved: payTo not seen in the payer forensics (180 wallets' outbound history) or the Blockscout sample

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "action": {
    "amount": "1.00",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "kind": "PAYMENT",
    "network": "eip155:8453",
    "recipient": "0x000000000000000000000000000000000000dEaD",
    "resource": "https://service.example/api",
    "sender": null
   },
   "options": {
    "screen_recipient_sanctions": true
   },
   "policy": {
    "allowed_assets": [
     "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
    ],
    "allowed_networks": [
     "eip155:8453"
    ],
    "allowed_resource_origins": [
     "https://service.example"
    ],
    "expected_recipient": null,
    "max_amount": "5.00"
   },
   "references": {
    "mandate_digest": null
   }
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example_truncated": true,
  "chars": 550
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://mcp.onchaindiligence.com/x402/preflight-payment' -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/7f87666c9821/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"7f87666c9821"} 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 mcp.onchaindiligence.com.