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vncent786

Bounty-api

by vncent786
OverviewSchemaRelated ServersScoreDiscussions
Python
Hybrid

Bounty API

Agent-native data APIs where AI agents pay per request in USDC on Base. Global research endpoints plus Singapore property workflows, live now.

Live at bountyapi.com

What it does

AI agents discover data APIs via MCP, call them, and pay automatically using x402 micropayments. No API keys. No subscriptions. One price per call, known upfront, settled on-chain.

Agent calls GET /company/stripe.com
  → Server returns 402 Payment Required ($0.05 USDC)
  → Agent signs payment on Base
  → Server returns data + settlement receipt
  → Transaction verifiable on Basescan

Related MCP server: HSH Data-on-Demand

Verified working

Real on-chain transaction — an AI agent autonomously paid for data on Base mainnet:

  • Tx: 0xc42354ea...

  • Amount: $0.01 USDC

  • Network: Base (eip155:8453)

  • Facilitator: PayAI

Architecture

Layer 1: Raw API endpoints (FastAPI)
  → bountyapi.com/bsd, /hdb/towns, /postal/{code}, etc.

Layer 2: x402 payment middleware
  → Paid endpoints return 402 + payment instructions
  → Agent pays USDC on Base → facilitator verifies → data returned

Layer 3: MCP discovery (npm: bountyapi-mcp)
  → Agents discover APIs as tools via Model Context Protocol
  → Supports both stdio (npx) and HTTP transport (/mcp endpoint)
  → Wallet-aware: auto-pays for paid endpoints when configured

Live APIs

API

Type

Price

Description

Company Intelligence

PAID

$0.05/call

Tech stack, contacts, social links, SSL/security headers from company websites

News Search

PAID

$0.01/call

Structured current news by keyword

Job Search

PAID

$0.02/call

Job postings and hiring signals for GTM/recruiting research

App Reviews

PAID

$0.02/call

Recent App Store reviews with rating sample and topic flags

Stamp Duty (BSD + ABSD)

FREE

$0

Singapore property stamp duty, verified against IRAS

Postal District Lookup

FREE

$0

Singapore postal district mapping

Mortgage Calculator

FREE

$0

Standard amortization

Currency Converter

FREE

$0

ECB rates

HDB Resale Data

PAID

$0.01/call

Government transaction data from data.gov.sg

Rental Yield Calculator

PAID

$0.005/call

Investment metrics (gross yield, cap rate, cashflow)

Every response carries source provenance. No interpolated or fabricated values.

Quick start

Install the MCP server

npx bountyapi-mcp

With payment support (for paid endpoints)

EVM_PRIVATE_KEY=0x... MAX_SPEND_USD=1.00 npx bountyapi-mcp

Claude Desktop config

{
  "mcpServers": {
    "bounty": {
      "command": "npx",
      "args": ["bountyapi-mcp"],
      "env": {
        "EVM_PRIVATE_KEY": "0x...",
        "MAX_SPEND_USD": "1.00"
      }
    }
  }
}

Then ask Claude: "What's the stamp duty on a $1.5M Singapore property for a first-time buyer?"

Direct API calls (no MCP needed)

# Free endpoint
curl https://bountyapi.com/bsd?price=1500000
# → {"bsd": 44600, "source": "iras.gov.sg"}

# Paid endpoint (returns 402 without payment)
curl https://bountyapi.com/hdb/towns
# → 402 Payment Required + x402 challenge

Tech stack

  • Backend: FastAPI (Python), deployed on Railway

  • Payments: x402 protocol, USDC on Base, PayAI facilitator

  • MCP: TypeScript, @modelcontextprotocol/sdk, @x402/evm

  • Data sources: IRAS, URA, data.gov.sg, ECB

  • Domain: bountyapi.com (SSL via Railway/Let's Encrypt)

Project structure

├── app.py              # Main FastAPI app, landing page, routes
├── pages.py            # Site pages (pricing, setup, API detail pages)
├── payment.py          # x402 payment middleware config
├── apis/               # API modules (postal, rental, hdb, mortgage, etc.)
├── mcp-server/         # TypeScript MCP server (published to npm)
├── public/             # Favicons, OG images, webmanifest
└── Dockerfile          # Railway deployment

Development

# Backend
pip install -r requirements.txt
uvicorn app:app --reload

# MCP server
cd mcp-server
npm install
npm run build
node dist/index.js

License

MIT

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