api.immuta.app
https://api.immuta.appLatest PulseChain block number and timestamp.
Paid verification
How it worksNo sponsored paid call yet.
Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.
Quality grade
How grading works- ✓ Answers a real HTTP 402 challenge
- ✓ Publishes a /.well-known/x402 descriptor
- ✓ Payment address on record
- ✓ Settlement network declared
- ✓ Price declared
x402 readiness
Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here A, 73.5/100), which weighs availability, payability and on-chain demand. How the two differ
| Valid payment requirements | 10/10 | Payment requirements carry a payee, a mainnet network and a price. |
| Live 402 challenge | 20/25 | Endpoint reachable; its 402 challenge was seen earlier (424 ms). |
| x402 version | n/a | x402 version not observed yet. |
| Signed descriptor | n/a | No x402 standard defines a signed descriptor. |
| Uptime (30 days) | 15/15 | 32/32 probes succeeded over 30 days (100%). |
| Resource declaration | 10/10 | Declares 3 paid resource(s). |
| Verified identity | 5/10 | Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control. |
| Freshness + modern flags | 3/5 | seen within 30 days; declares x402. |
| Security declaration | n/a | Payment is the access control for an x402 resource. |
Compared with peers
Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.
- Readiness
- Higher than 67% of peers
- This listing 84 · peer median 78
- Latency
- Faster than 25% of peers
- This listing 424 ms · peer median 205 ms
Where it loses the most points, and how to win them back
- Live 402 challenge −5
— Answer the paid path with a valid 402 challenge.
Now: Endpoint reachable; its 402 challenge was seen earlier (424 ms).
- Verified identity −5
— Claim the listing and prove control of its domain.
Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
- Freshness + modern flags −2
— Keep the listing current in the registry or source it comes from.
Now: seen within 30 days; declares x402.
Paid endpoints
3 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.
https://api.immuta.app/seal
Notarize a document on-chain. Send a SHA-256 hash; receive a permanent, timestamped, independently verifiable PulseChain record and a PDF Certificate of Existence. The document itself never leaves your system - only the hash is transmitted. Use for contracts, audit trails, IP protection, compliance
https://api.immuta.app/pulsechain/head
Latest PulseChain block number and Unix timestamp, served from live chain state.
https://api.immuta.app/pulsechain/block-by-timestamp
Resolve any Unix timestamp to the exact PulseChain block at or nearest that moment (binary search, precise to one block). Supports before/after modes. Useful for tax lots, historical price lookups, and event correlation.
How to call
curl -sS -i -X GET https://api.immuta.app # expect HTTP 402 Payment Required (about $0.001/call)Listed in
Directories this entry was found in.