x402 census · agentbit.app · 6a9b3d9a58b4 · JSON
POST /v1/x402/inspect
live
Lint any x402 endpoint or payment header against the v2 spec and real CDP facilitator behavior: CAIP-2 network ids, atomic amounts, the EIP-712 domain-name trap ('USD Coin' on Base mainnet vs 'USDC' on Sepolia — wrong name = every settlement fails), the extensions echo Coinbase Bazaar requires for indexing, expired authorizations. Findings as error/warning/info with what will actually break. Buil…
Verdict: live. The unpaid GET reached a valid 402 (confirmed by the re-probe of 2026-10-01).
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://agentbit.app/v1/x402/inspect |
| Method | POST |
| Price | $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x4395C7e383b7e05665aad7f36ed77c01923Dd965 |
| Seller | agentbit.app |
| Catalogs | cdp (row updated 2026-09-06) |
| Listed since (lower bound) | 2026-09-06 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-06 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-09-06 (catalog-reported, not verified on chain) |
| Category (keyword rule) | crypto-data |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | none |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
Latest re-probe
| Field | Value |
|---|---|
| Re-probed at | 2026-10-01T15:13:42.000Z (cron) |
| Verdict now | live changed from unprobed |
| HEAD / GET | 429 / 402 |
| accepts[0] | {"scheme":"exact","network":"eip155:8453","amount":"1000","payTo":"0x4395C7e383b7e05665aad7f36ed77c01923Dd965","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}} |
| Live amount equals catalog price | yes |
| Latency | 1,491 ms |
| Error | none |
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 2 |
| Payments | 6 |
| USDC volume | $0.07 |
| Median payment | $0.01 |
| First / last payment | 2026-09-15 / 2026-09-30 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x4395C7e383b7e05665aad7f36ed77c01923Dd965 (contract: EIP7702Proxy) |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"url": "https://agentbit.app/v1/web/search"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example": {
"accepts_count": 1,
"counts": {
"errors": 0,
"infos": 1,
"warnings": 0
},
"findings": [
{
"code": "EIP712_DOMAIN_OK",
"level": "info",
"message": "accepts[0]: extra.name matches USDC on Base mainnet."
}
],
"http_status": 402,
"mode": "live-probe",
"url": "https://agentbit.app/v1/web/search",
"verdict": "pass"
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://agentbit.app/v1/x402/inspect' -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/6a9b3d9a58b4/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"6a9b3d9a58b4"} 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 agentbit.app.