hive-receipt

Universal Spectral-signed payment receipts. x402 Base USDC. On-chain verification for Base, Ethereum, and Solana.

■ Brand: #C08D23

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Overview

hive-receipt issues cryptographically signed receipts for any on-chain payment across Base, Ethereum, and Solana. Every receipt is signed with a Spectral ed25519 keypair — the public key is advertised in the agent card so any party can verify offline without trusting the server.

Settlement rail: Base mainnet — USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)
Monroe treasury: 0x15184Bf50B3d3F52b60434f8942b7D52F2eB436E
Signature algo: ed25519 (Spectral)
On-chain verification: Base, Ethereum, Solana — best-effort via public RPCs

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Pricing

Tier	Amount (atomic USDC)	USD	Notes
Standard	1000	$0.001	Immediate signed receipt
Audit (?tier=audit)	100000	$0.10	7-year retention guarantee

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Tools (MCP)

Tool	Description
sign_receipt	Sign a payment receipt. Returns Spectral ed25519 envelope. x402 gated — use POST /v1/receipt/sign with X-PAYMENT.
verify_receipt	Verify a receipt by receipt_id. Re-verifies ed25519 signature against embedded pubkey.
list_my_receipts	List all receipts for a payer_did.

MCP endpoint: POST /mcp (JSON-RPC 2.0, MCP 2024-11-05)

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REST Endpoints

Method	Path	Auth	Description
GET	/health	none	Health check
GET	/	none	Service info + pubkey + pricing
GET	/.well-known/agent.json	none	Agent card (Monroe + Spectral pubkey advertised)
POST	/mcp	none	MCP JSON-RPC
POST	/v1/receipt/sign	x402	Sign a receipt; 402 fires without X-PAYMENT
GET	/v1/receipt/verify/:receipt_id	none	Verify receipt signature
GET	/v1/receipt/list/:payer_did	none	List receipts for payer

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x402 Payment Challenge

Standard tier — calling POST /v1/receipt/sign without X-PAYMENT:

{
  "x402_version": "0.2.0",
  "error": "Payment Required",
  "accepts": [{
    "scheme": "exact",
    "network": "base",
    "chainId": 8453,
    "asset": "USDC",
    "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "maxAmountRequired": "1000",
    "payTo": "0x15184Bf50B3d3F52b60434f8942b7D52F2eB436E",
    "resource": "/v1/receipt/sign",
    "description": "Hive universal receipt signature — $0.001 per receipt.",
    "mimeType": "application/json"
  }]
}

Audit tier: add ?tier=audit — maxAmountRequired becomes "100000".

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Sample Signed Envelope

{
  "receipt_id": "a1b2c3d4e5f6...",
  "tx_hash": "0xabc...",
  "network": "base",
  "expected_recipient": "0x15184Bf50B3d3F52b60434f8942b7D52F2eB436E",
  "expected_amount_atomic": 1000000,
  "expected_asset": "USDC",
  "payer_did": "did:hive:0xpayer...",
  "payee_did": "did:hive:0xpayee...",
  "verified": true,
  "verification_attempted": true,
  "verification_status": "verified",
  "tier": "standard",
  "generated_at": "2025-05-01T12:00:00.000Z",
  "signature": "<base64-ed25519-sig>",
  "public_key": "<base64-spki-pubkey>",
  "signed_payload_sha256": "<sha256-of-payload>",
  "signature_algo": "ed25519"
}

Offline Verification

Anyone can verify a receipt offline:

import crypto from 'crypto';

// pubkey from /.well-known/agent.json -> spectral.public_key
const pubKeyDer = Buffer.from(envelope.public_key, 'base64');
const pubKeyObj = crypto.createPublicKey({ key: pubKeyDer, format: 'der', type: 'spki' });

const { signature, public_key, signed_payload_sha256, signature_algo, ...payload } = envelope;
const payloadStr = JSON.stringify(payload);
const valid = crypto.verify(null, Buffer.from(payloadStr), pubKeyObj, Buffer.from(signature, 'base64'));
console.log('valid:', valid); // true

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On-Chain Verification

Network	RPC	Verification Method
Base (8453)	https://mainnet.base.org	eth_getTransactionReceipt
Ethereum	https://eth.llamarpc.com	eth_getTransactionReceipt
Solana	https://api.mainnet-beta.solana.com	getTransaction

All verification is best-effort. If the RPC is unreachable, verification_status is set to "unverified" but the receipt is still signed. The signature proves the server attested to the inputs at a given time.

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Supported Rails

Network	Asset	Address / Mint
Base 8453	USDC	0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Base 8453	USDT	0xfde4C96c8593536E31F229EA8f37b2ADa2699bb2
Solana	USDC	EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v
Solana treasury	—	B1N61cuL35fhskWz5dw8XqDyP6LWi3ZWmq8CNA9L3FVn

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Pairs With

• hive-checkout — bundle multiple tool payments; request a receipt for the settlement.
• hive-mcp-evaluator — sign a receipt after an LLM evaluation job settles.

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Connect

Smithery: https://smithery.ai/server/srotzin/hive-receipt
Glama: https://glama.ai/mcp/servers/srotzin/hive-receipt
Repo: https://github.com/srotzin/hive-receipt

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Built on Base mainnet. Real rails only. Brand gold #C08D23. Hivemorph stays private.

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Hive Civilization

Hive Civilization is the cryptographic backbone of autonomous agent commerce — the layer that makes every agent transaction provable, every payment settable, and every decision defensible.

This repository is part of the PROVABLE pillar.

• thehiveryiq.com
• hiveagentiq.com
• agent-card: https://hivetrust.onrender.com/.well-known/agent-card.json