AI Action Receipts
AI Action Receipts: seal the HASHES of an AI action (input/output as hashes; your action label + meta are published) into GBLIN's signed append-only transparency log. Portable receipt: Ed25519 signature + RFC 6962 inclusion proof + C2SP signed checkpoint; root anchored daily on Base (EAS). Proves existence and time — not a compliance certificate. Free reads + demo: gblin-mcp.gblin-mcp-worker.workers.dev/log. Offline verifier: github.com/gblinproject/gblin-treasury-risk-regime
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://gblin.digital/api/x402/seal
| Category | Company and compliance |
|---|---|
| Provider host | gblin.digital |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 5 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.0045 | 299 ms |
Example input (from the provider)
{
"body": {
"action": "summarise-contract",
"input_hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"action": {
"description": "Short public label for what the AI did. PUBLISHED in the log: identifiers only, never secrets.",
"maxLength": 128,
"type": "string"
},
"agent_id": {
"description": "Your agent identifier (optional). PUBLISHED.",
"maxLength": 128,
"type": "string"
},
"input_hash": {
"description": "sha256 of your input, 64 hex chars (0x prefix optional)",
"pattern": "^(0x)?[0-9a-fA-F]{64}$",
"type": "string"
},
"meta": {
"description": "Extra JSON object as a string (optional). PUBLISHED.",
"maxLength": 512,
"type": "string"
},
"output_hash": {
"description": "sha256 of your output, 64 hex chars (optional)",
"pattern": "^((0x)?[0-9a-fA-F]{64})?$",
"type": "string"
},
"tool": {
"description": "Tool or model used (optional). PUBLISHED.",
"maxLength": 128,
"type": "string"
}
},
"required": [
"action",
"input_hash"
],
"type": "object"
},
"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": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}