← The evidence ledger
Evidence row 4463
Observed , by baseline/1.
- Kind
- listing
- About
- source_record agentic_market:x402-fairseal-io
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- b770bb2ac237fbb9533ac5348e0bf85976a582b59e075669a8516727359ac437
- Leaf
- 0x890a13115edd00b6801a8714c3cc9f437967663fa484ba0ca4ee2bd88754baee
What was observed
{
"endpoints": [
[
"x402",
"https://x402.fairseal.io/v1/notarize"
],
[
"x402",
"https://x402.fairseal.io/v1/pii/detect"
],
[
"x402",
"https://x402.fairseal.io/v1/rng/latest"
],
[
"x402",
"https://x402.fairseal.io/v1/veo/verify"
],
[
"x402",
"https://x402.fairseal.io/v2/anchor"
]
],
"name": "x402.fairseal.io",
"owner_address": null,
"raw": {
"caip2_networks": [
"eip155:8453"
],
"category": "",
"description": "",
"domain": "x402.fairseal.io",
"endpoints": [
{
"description": "Anchor an AI agent decision or audit record to Base mainnet. Submit {schema, payload_hash (SHA-256 hex, 64 chars), metadata}; service queues into a Merkle batch and returns a receipt with pending_anchor status immediately. Full Merkle proof and on-chain anchor_tx available via free GET /v1/notarize/:receipt_id after batch anchors (within batch_threshold receipts or 120s). Include Idempotency-Key header to prevent double-charges on retry.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": null,
"group": "body",
"name": "metadata",
"required": false,
"type": "object"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
"group": "body",
"name": "payload_hash",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "agent_decision",
"group": "body",
"name": "schema",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.05",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "9",
"l30DaysUniquePayers": "2"
},
"serviceName": "",
"tags": [],
"url": "https://x402.fairseal.io/v1/notarize"
},
{
"description": "Regex PII scan: emails, US/CA (NANP) phones, dash-formatted national IDs (partial; Taiwan-format alphanumeric IDs not matched), loose passports, 64-hex crypto keys (may flag SHA-256), credit cards (contiguous IIN prefix + spaced/dashed 4-4-4-4 and 4-6-5, Luhn-checked), US SSNs, IPv4. Longest-match overlap resolution. Returns sanitized text. Max 50,000 chars. Expect false positives and misses; non-NANP phones not matched.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "Contact alice@example.com or call 555-867-5309. SSN: 123-45-6789.",
"group": "body",
"name": "text",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.001",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "10",
"l30DaysUniquePayers": "4"
},
"serviceName": "",
"tags": [],
"url": "https://x402.fairseal.io/v1/pii/detect"
},
{
"description": "Provably fair random numbers, commit-reveal protocol. SHA-256 commit is free (POST /v1/rng/commit); pay $0.01 to reveal a verifiable random number backed by a cryptographic VDF chain with on-chain Merkle anchor. Bias-resistant; do not construct reveal paths yourself.",
"method": "GET",
"parameters": [],
"pricing": {
"amount": "0.01",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "14",
"l30DaysUniquePayers": "5"
},
"serviceName": "",
"tags": [],
"url": "https://x402.fairseal.io/v1/rng/latest"
},
{
"description": "Verify AI agent outputs against a VEO-2 schema. Checks structural validity, SHA-256 hash integrity (if content hash is present), and optional cryptographic signature on the output (if proof.provider_signature is present). Returns a verdict with per-check details.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": null,
"group": "body",
"name": "confidence",
"required": false,
"type": "object"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": null,
"group": "body",
"name": "execution",
"required": false,
"type": "object"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "2026-09-12T10:00:00Z",
"group": "body",
"name": "issued_at",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "VEO-2A",
"group": "body",
"name": "object_class",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "veo-abc123",
"group": "body",
"name": "object_id",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": null,
"group": "body",
"name": "provider",
"required": false,
"type": "object"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "VEO",
"group": "body",
"name": "standard",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "2.0",
"group": "body",
"name": "version",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.002",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "5",
"l30DaysUniquePayers": "3"
},
"serviceName": "",
"tags": [],
"url": "https://x402.fairseal.io/v1/veo/verify"
},
{
"description": "Anchor a SHA-256 payload hash (64 lowercase hex chars) into a Merkle batch on Base mainnet. Payment: $0.001 USDC per submission (batch-settled). Returns anchor_id (202); poll status_url for Merkle proof + on-chain tx hash.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": null,
"group": "body",
"name": "metadata",
"required": false,
"type": "object"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
"group": "body",
"name": "payload_hash",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "batch",
"group": "body",
"name": "tier",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.02",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "6",
"l30DaysUniquePayers": "2"
},
"serviceName": "",
"tags": [],
"url": "https://x402.fairseal.io/v2/anchor"
}
],
"enriched": false,
"iconUrl": "",
"id": "x402-fairseal-io",
"integrationType": "",
"isNew": false,
"name": "x402.fairseal.io",
"networks": [
"Base"
],
"priceSummary": {
"avgCostBasis": "exact",
"avgCostPerTransaction": "0.0166",
"currency": "USDC",
"maxAmount": "0.05",
"minAmount": "0.001"
},
"provider": "x402.fairseal.io",
"providerUrl": "",
"serviceName": "",
"tags": []
},
"source": "agentic_market",
"summary": ""
}What the leaf hashes
{"body":"b770bb2ac237fbb9533ac5348e0bf85976a582b59e075669a8516727359ac437","id":4463,"kind":"listing","method":"baseline/1","observed_us":1793025277928616,"prev":null,"subject":"agentic_market:x402-fairseal-io","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x8909ff3e84a9d32436def56ac28ef6e914fcec4cf073d4a5b8ff264d00935230
- 0xdfebf862f32e858b5c91519224e8e388987171a4cf1533c77eaf4ec8f4b7e130
- 0xa1449c8f05914ea38750f737f40d802e13f7fe5e89d9efeb0641ff6e3d9de941
- 0x89a69040005414cd7821940c2e20746988dd199524b57f7930ce887207d758b2
- 0xea2a95551a04a6640b2cfb90bc4fe89c8946d8616ab004fc6c1d38b51ff1416b
- 0x9447c21ec033b1bb502cc591e0fe42f30008b42128a3785e7842db1311348177
- 0x9b4f3a20ed0715c96737ddd3d809db2fdd61d46a4fd3afed290d0942ccc8f8d3
- 0xf26b188eef15309c5b23df8621c7025007a91c6cb0a9a8a666fd863d53a3f2f7
- 0x00e68f9c46b0f141c7ad95897ef8972e0da00f0b638ec98c8542cf0bb4478e6a
- 0xed8c683cc2523b6faaf9567b2bca065f0b0b5a96cb16dc02a32ff230916396f8
- 0xfb2bf7248df06c668bce5c2fce26586eb8982728138c40f164c1666cb3e32d7b
- 0x7bf2d426bb827b94d7608055662cf2e3f09791e1a4c2c6bd606c0a9e89b18e59
- 0x49d11be052a4c069b10250aaba214f566b3f2e5aaa7a98e82ccc6a71c0e801a0
- 0x78ac2b34737774659a6a411f4d10b8ba570d40699d9f277321c3a32ff03d1dc9
- 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
- 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae