Deterministic JSON hashing and structured extraction for AI agents. Three paid routes: /v1/canonicalize (RFC 8785 canonicalization + SHA-256/512 + EIP-712 attestation, $0.002), /v1/canonicalize/batch (up to 1000 payloads, $0.01), /v1/structure/paid (structured JSON extraction from messy text, $0.005). Every successful response includes an EIP-712 signed attestation verifiable against /.well-kno...
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 B, 63.6/100), 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 | 25/25 | Paid endpoint answers with an HTTP 402 challenge (123 ms). |
| x402 version | 10/10 | Speaks x402 v2. |
| Signed descriptor | n/a | No x402 standard defines a signed descriptor. |
| Uptime (30 days) | 15/15 | 31/31 probes succeeded over 30 days (100%). |
| Resource declaration | 10/10 | Declares 4 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 | 5/5 | seen in a source within 7 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 95% of peers
- This listing 94 · peer median 78
- Latency
- Faster than 78% of peers
- This listing 123 ms · peer median 205 ms
Where it loses the most points, and how to win them back
- 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.
Paid endpoints
4 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://canonicalhash-production.up.railway.app/v1/canonicalize
$0.0020 / call
Canonicalize any JSON with RFC 8785 + SHA-256/512 and get an EIP-712 signed attestation. Deterministic: same input produces identical output, byte-for-byte, in any runtime. Use when an agent needs an idempotency key, cache key, dedup hash, or verifiable commitment. $0.002 per call on Base or Solana. Free verification at POST /v1/verify.
https://canonicalhash-production.up.railway.app/v1/canonicalize
$0.0020 / call
Canonicalize any JSON with RFC 8785 + SHA-256/512 and get an EIP-712 signed attestation. Deterministic: same input produces identical output, byte-for-byte, in any runtime. Use when an agent needs an idempotency key, cache key, dedup hash, or verifiable commitment. $0.002 per call on Base or Solana. Free verification at POST /v1/verify.
https://canonicalhash-production.up.railway.app/v1/canonicalize/batch
$0.0100 / call
Batch canonicalize up to 1000 JSON payloads in one call — one signature, one payment, one attestation. Same RFC 8785 canonicalization as /v1/canonicalize. Use when an agent needs to fingerprint a dataset, dedup a batch of records, or hash many inputs in a single round-trip. $0.01 flat per call (about $0.00001 per item). Free verification at POST /v1/verify.
https://canonicalhash-production.up.railway.app/v1/receipt
$0.0010 / call
Verifiable action receipt for AI agents. Submit any JSON action object and get back an EIP-712 signed receipt proving the action occurred at a specific time. Tamper-evident, non-repudiable by the service, and verifiable by anyone at POST /v1/verify. Use when an agent needs an audit trail, compliance record, or provenance proof. $0.001 per receipt.
https://canonicalhash-production.up.railway.app/v1/structure/paid
$0.0050 / call
Extract structured JSON from messy text. Deterministic Tier 1 (regex, exact) handles labeled inputs in under 50ms; Needle 3 model fallback handles free-form text. Use when an agent needs to turn emails, logs, tickets, or notes into fields it can act on. $0.005 per call. No charge on extraction failure. Free verification at POST /v1/verify.
How to call
curl -sS -i -X GET https://canonicalhash-production.up.railway.app/v1/canonicalize # expect HTTP 402 Payment Required (about $0.001/call)Listed in
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