HashProof
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Reputation
formula v1.3Signals
Verifiable credentials API on Celo and Base. Issue trusted digital certificates with one API call for $0.10 USDC via x402 — no account, no API key. Each credential is registered on-chain in the CredentialRegistry contract on Celo (0x7a1B759A602Aba72a70f99Dffd0a386d7504ce9B), pinned to IPFS, and comes with a PDF with a QR code anyone can scan to verify for free against three independent sources. Agent-usable end to end: discover required fields at GET /templates/:ref/requirements (free), then POST /issueCredential paying x402 with USDC on Base (eip155:8453) or Celo (eip155:42220). Full agent guide at https://hashproof.dev/skill.md.
Source: https://www.hashproof.dev/metadata.json
Raw metadata
{
"name": "HashProof",
"type": "https://eips.ethereum.org/EIPS/eip-8004#registration-v1",
"image": "https://www.hashproof.dev/hashproof-favicon.png",
"active": true,
"services": [
{
"name": "web",
"endpoint": "https://hashproof.dev"
},
{
"name": "x402-issue-credential",
"version": "x402-v2",
"endpoint": "https://api.hashproof.dev/issueCredential"
},
{
"name": "MCP",
"version": "2025-06-18",
"endpoint": "https://api.hashproof.dev/mcp"
},
{
"name": "skill",
"endpoint": "https://hashproof.dev/skill.md"
},
{
"name": "agentWallet",
"endpoint": "eip155:42220:0x0a25C91209a158D0a4922837cdd590aCe0D13f0d"
},
{
"name": "OASF",
"skills": [
"tool_interaction/workflow_automation",
"tool_interaction/api_schema_understanding",
"science_and_specialized_domains/blockchain_and_web3"
],
"domains": [
"technology/blockchain"
],
"version": "0.8.0",
"endpoint": "https://api.hashproof.dev/"
}
],
"updatedAt": 1785196800,
"description": "Verifiable credentials API on Celo and Base. Issue trusted digital certificates with one API call for $0.10 USDC via x402 — no account, no API key. Each credential is registered on-chain in the CredentialRegistry contract on Celo (0x7a1B759A602Aba72a70f99Dffd0a386d7504ce9B), pinned to IPFS, and comes with a PDF with a QR code anyone can scan to verify for free against three independent sources. Agent-usable end to end: discover required fields at GET /templates/:ref/requirements (free), then POST /issueCredential paying x402 with USDC on Base (eip155:8453) or Celo (eip155:42220). Full agent guide at https://hashproof.dev/skill.md.",
"x402Support": true,
"registrations": [
{
"agentId": 1867,
"agentRegistry": "eip155:42220:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432"
},
{
"agentId": 9669,
"agentRegistry": "eip155:42220:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432"
}
],
"supportedTrust": [
"reputation"
]
}
Registrations
Cross-chain pointers from this agent's metadata back to its on-chain identity.
| Chain | Registry | Agent ID |
|---|---|---|
| Celo Mainnet | 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432 | 1867 |
| Celo Mainnet | 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432 | 9669 |
Services
-
webEndpoint
https://hashproof.dev -
x402-issue-credential vx402-v2Endpoint
https://api.hashproof.dev/issueCredential -
MCP v2025-06-18Endpoint
https://api.hashproof.dev/mcp -
skillEndpoint
https://hashproof.dev/skill.md -
agentWalletEndpoint
eip155:42220:0x0a25C91209a158D0a4922837cdd590aCe0D13f0d -
OASF v0.8.0Endpoint
https://api.hashproof.dev/Skills tool_interaction/workflow_automation tool_interaction/api_schema_understanding science_and_specialized_domains/blockchain_and_web3
The ValidationRegistry contract is not yet deployed on Celo Mainnet. Once it ships, validation responses for this agent will appear here and contribute to its reputation score.
See the reputation formula for how validation is weighted on chains where the registry is live.