x402 census · mimirapi.com · 732844e940d1 · JSON

POST /v1/provenance/certificate

live

Chain-of-custody license certificate for any digital asset: a SHA-256 content hash bound to issuer, subject, and license terms under an HMAC-SHA-256 signature. Deterministic, portable, and verifiable through the issuer while the current HMAC v1 profile is active — a receipt an agent can carry to record what it licensed, from whom, and on what terms.

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

Facts from the catalogs

Field Value

URL https://mimirapi.com/v1/provenance/certificate

Method POST

Price $0.25 USDC = 250000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x40e5A6647803c2DD686049dcDC5F9c34817D7a7F

Seller mimirapi.com

Catalogs cdp (row updated 2026-10-04)

Listed since (lower bound) 2026-10-04 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-04

CDP quality counters 1 calls and 1 unique payers in 30 days, last call 2026-10-04 (catalog-reported, not verified on chain)

Category (keyword rule) domains/dns

Templated path no

x402Version in catalog 2

Service name / tags MimirAPI · provenance, license, certificate, signing, trust

Unpaid probe (census of 2026-10-22)

Field Value

Probed at 2026-10-22T00:29:19.568Z

HEAD 402

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header+body

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"250000","payTo":"0x40e5A6647803c2DD686049dcDC5F9c34817D7a7F","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":60,"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 yes

WWW-Authenticate offer none

Content type / server / CORS application/json / cloudflare / none

Latency 165 ms

Error PAYMENT-SIGNATURE header is 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 6

Payments 6

USDC volume $0.07

Median payment $0.01

First / last payment 2026-07-27 / 2026-09-15

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x40e5A6647803c2DD686049dcDC5F9c34817D7a7F

Declared input and output (extensions.bazaar)

{
 "input": {
  "body": {
   "contentHash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
   "license": "CC-BY-4.0",
   "subject": "did:web:agent.example.com"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "certificate": {
    "alg": "HMAC-SHA-256",
    "contentHash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
    "issuedAt": "2026-07-21T00:00:00.000Z",
    "issuer": "MimirAPI",
    "license": "CC-BY-4.0",
    "signature": "9b1a…hex HMAC-SHA-256…",
    "subject": "did:web:agent.example.com"
   }
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X POST 'https://mimirapi.com/v1/provenance/certificate' -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/732844e940d1/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"732844e940d1"} 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 mimirapi.com.