x402 census · base-sentinel-production.up.railway.app · f4b6c9c2b0b6 · JSON
POST /api/hash
unprobed
Cryptographic hash of a text string - sha256 (default), sha512, sha1 or md5 - returned as hex and base64. Use it for content fingerprints, integrity checks and deterministic ids; pure computation, instant.
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
| Field | Value |
|---|---|
| URL | https://base-sentinel-production.up.railway.app/api/hash |
| Method | POST |
| Price | $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x8d3EaAD4b12bfc67e952dE517748C793C77eAD42 |
| Seller | base-sentinel-production.up.railway.app |
| Catalogs | payai (row updated 2026-08-30) |
| Listed since (lower bound) | 2026-08-30 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-08-30 |
| CDP quality counters | not in the CDP catalog |
| 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 |
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 |
|---|---|
| Settlement history | unresolved: payTo not seen in the payer forensics (180 wallets' outbound history) or the Blockscout sample |
Try it (unpaid: shows the 402)
curl -si -X POST 'https://base-sentinel-production.up.railway.app/api/hash' -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/f4b6c9c2b0b6/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"f4b6c9c2b0b6"} 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: PayAI listing status · this record as JSON · all resources on base-sentinel-production.up.railway.app.