← The evidence ledger
Evidence row 1038730
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://getamber.dev/api/v1/contracts
- Recorded
- Previous row
- #75822
- Body SHA-256
- 84dbabb65ebb0913bc6817f0dd3121e4f38597dc660b65d80e9734927e0b545a
- Leaf
- 0x6e582743828ce3a56eb878329d65e76540c39dd92a5c8a1e90d468b1a527cb84
What was observed
{
"endpoints": [
[
"x402",
"https://getamber.dev/api/v1/contracts"
]
],
"name": "Ambr",
"owner_address": "0x74dd76622fe346df084f5cda7cca3dd322c70174",
"raw": {
"accepts": [
{
"amount": "200000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x74Dd76622fE346df084f5CDA7CcA3DD322c70174",
"scheme": "exact"
}
],
"description": "Ambr (ambr.run): create a Ricardian contract that an AI agent signs on behalf of its principal, a person or company. Call it when your agent agrees a deal with another party (an API or compute service, a purchase, a subscription, or a delegation of authority) and needs a signed written record. Returns legal text and machine-readable JSON bound by one SHA-256 hash, plus reader and sign links; the parties sign with their wallets. Templates: GET /api/v1/templates.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"parameters": {
"consumer_email": "consumer@example.com",
"consumer_name": "Example Consumer",
"currency": "USDC",
"delivery_timeline": "Within 24 hours of payment",
"fee": 20,
"governing_law": "Singapore",
"provider_agent_id": "0x0000000000000000000000000000000000000002",
"provider_name": "Example Provider Ltd",
"refund_policy": "Full refund within 14 days if not delivered",
"service_description": "One month of market data via API"
},
"principal_declaration": {
"agent_id": "0x0000000000000000000000000000000000000001",
"principal_name": "Example Principal",
"principal_type": "company"
},
"template": "a1-service-purchase"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"contract_id": "amb-2026-0001",
"created_at": "2026-10-29T12:00:00.000Z",
"handshake_url": "https://getamber.dev/api/v1/contracts/amb-2026-0001/handshake",
"next_step": "Contract created as draft. Optionally handshake first, then both parties must sign (ECDSA) to activate.",
"payment_method": "x402",
"reader_url": "https://getamber.dev/reader/9f2c4e8a1b7d3f6e0a5c9b2d8e4f1a7c3b6d0e9f2a5c8b1d4e7f0a3c6b9d2e5f?token=<share-token>",
"require_zk_identity": false,
"sha256_hash": "9f2c4e8a1b7d3f6e0a5c9b2d8e4f1a7c3b6d0e9f2a5c8b1d4e7f0a3c6b9d2e5f",
"sign_url": "https://getamber.dev/api/v1/contracts/amb-2026-0001/sign",
"status": "draft",
"visibility": "private"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"parameters": {
"description": "Template parameters",
"type": "object"
},
"parent_contract_hash": {
"description": "SHA-256 of a parent contract (amendments)",
"type": "string"
},
"principal_declaration": {
"description": "Who the agent acts for",
"type": "object"
},
"template": {
"description": "Template slug, see GET /api/v1/templates",
"type": "string"
},
"visibility": {
"enum": [
"private",
"metadata_only",
"public",
"encrypted"
],
"type": "string"
}
},
"required": [
"template",
"parameters",
"principal_declaration"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"approve_url": {
"description": "Present when the principal must approve first",
"type": "string"
},
"contract_id": {
"description": "Ambr contract id",
"type": "string"
},
"created_at": {
"format": "date-time",
"type": "string"
},
"handshake_url": {
"description": "Optional counterparty handshake before signing",
"type": "string"
},
"next_step": {
"type": "string"
},
"payment_method": {
"enum": [
"x402",
"api_key"
],
"type": "string"
},
"principal_approval_required": {
"type": "boolean"
},
"reader_url": {
"description": "Read the contract (carries a share token when one was issued)",
"type": "string"
},
"require_zk_identity": {
"type": "boolean"
},
"sha256_hash": {
"description": "SHA-256 binding the legal text and the JSON",
"type": "string"
},
"sign_url": {
"description": "POST a wallet signature here",
"type": "string"
},
"status": {
"enum": [
"draft",
"awaiting_principal_approval"
],
"type": "string"
},
"visibility": {
"enum": [
"private",
"metadata_only",
"public",
"encrypted"
],
"type": "string"
}
},
"required": [
"contract_id",
"sha256_hash",
"status",
"reader_url",
"sign_url",
"created_at"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793279085/bazaar-icons/25c05cfd00a58541.png",
"lastUpdated": "2026-10-29T13:04:45.312Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-29T13:04:44.55Z"
},
"resource": "https://getamber.dev/api/v1/contracts",
"serviceName": "Ambr",
"tags": [
"contracts",
"legal",
"agent-identity",
"ricardian",
"delegation"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Ambr (ambr.run): create a Ricardian contract that an AI agent signs on behalf of its principal, a person or company. Call it when your agent agrees a deal with another party (an API or compute service, a purchase, a subscription, or a delegation of authority) and needs a signed written record. Returns legal text and machine-readable JSON bound by one SHA-256 hash, plus reader and sign links; the parties sign with their wallets. Templates: GET /api/v1/templates."
}What the leaf hashes
{"body":"84dbabb65ebb0913bc6817f0dd3121e4f38597dc660b65d80e9734927e0b545a","id":1038730,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298274804808,"prev":75822,"subject":"x402_bazaar:https://getamber.dev/api/v1/contracts","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (242798 rows).
- 0x6e58a2df9b32f0d50cd961e9f37b83ea67ca4eed6b03e105d7f9bb98f3691869
- 0xbea127f2b373b411820b16ddf94bdbbb747671b5c07abdacd7815cf0f5a55844
- 0xeb2b613167c9d2e69fd7f0e11345b70c8c7ecbe290624e7ff51fc9ac3957a32f
- 0x228e196bd4dc6eaeea27ae21cdaf4615939e86d6f23a37f3c10d314a29ed86e7
- 0x706bea2d37f749577bb571f5e9d2b7a857473650ab0da3f08d9b8224a8e4f59e
- 0xc37ef673684591aed4c003e766753c787dfb5a3d0d617dc48b1a1a7959ce1fcf
- 0x46dde1025445da1d9a424cad3c8c9ac6e4f6686741b0f8e759c4624fb9358a26
- 0x168f4a2d3f1582c26b65dca42054c9070c50b10d13a7393f2f95f50bfd0a46e4
- 0x2471f55796822d6bd393a28cb5b6327c68f62916f70a67780699e8f0c863a937
- 0xaee352a15ab4bc53c7e3254f0e17b5d085cef0f166dbcfb4701977b1e81828da
- 0xf61085ad7f5d976ac0dd641b89b18014d6da35440f475dcc63b08cefc091db55
- 0x5475ebd9df7198eeb73e1906dfc25f3050ca20da1e9e96ae5bc4155bacc17418
- 0x5e082ba4c95cbcfbd572fafcdfd31d533e69877dbf53c456d3c5b2f727f18ffe
- 0xec2e740df411d32a080c5e65c8b0ca511ad665b213532cee58525a97aebd2893
- 0x60b5befbd81f025904c8a3936b7ba86e3245ad5b37c615d01d42aa3227e3ed2e
- 0xe2d603cd6f987214550319ad4fa39952b6098bc5c1b20893b6b80e8d82a79934
- 0x91f12a2db1e2c1be07cbe4de3981a37a33051a36d3c3eee5a260804add6d1d75
- 0xd56e61af23709ed9f460471e3c08400c0142ee83e1fd9057e46350d12edf9c07
- Day root
- 0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c
- Chained
- 0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6
- Published
- On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1