Bounty API

Name: Bounty API
Author: vncent786

by vncent786version 1.8.0i★ –iComputer or cloud

Registry nameio.github.vncent786/bounty-api

Install

Overview

Description from the maker (original English)

Singapore property & financial data APIs for AI agents. 27 MCP tools. x402 micropayments.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Accounting, finance & tax
You need to fill in: EVM_PRIVATE_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: EVM_PRIVATE_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet
npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://bountyapi.com/mcp

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "bounty-api": {
      "command": "npx",
      "args": [
        "-y",
        "bountyapi-mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http bounty-api https://bountyapi.com/mcp

Or run it on your computer

claude mcp add bounty-api --env EVM_PRIVATE_KEY=your-value -- npx -y bountyapi-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "bounty-api": {
      "url": "https://bountyapi.com/mcp"
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "bounty-api": {
      "command": "npx",
      "args": [
        "-y",
        "bountyapi-mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "bounty-api": {
      "type": "http",
      "url": "https://bountyapi.com/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "bounty-api": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "bountyapi-mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://bountyapi.com/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

EVM_PRIVATE_KEY secret env
Optional. EVM private key to enable auto-pay for paid endpoints via x402. Without it, only the 8 free endpoints are callable; paid endpoints return a 402 payment challenge. Never required to use the…

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account vncent786, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Accounting, finance & taxi

More stars than 0% of the other 1722 servers in this category
Published to the registry more recently than 23% of the other 1722 servers in this category
Basic checks equal to or better than 100% of the other 1722 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Bounty API safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: EVM_PRIVATE_KEY

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.8.0) reached the registry 4 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Finance Toolkit, SolidInvoice, Korea Tax Calculator

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Finance Toolkit

by JerBouma

500+ transparent financial methods calculated from raw statements, not third-party endpoints.

Computer or cloud★ 5,496MITUpdated yesterday

Install

SolidInvoice

by SolidInvoice

Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.

Runs in the cloud★ 981MITUpdated 7 days ago

Install

Korea Tax Calculator

by UpstageAI

Korean tax calculation and tax-audit judgment MCP: 96 tools with statutory citations.

Runs on your computer★ 97MITUpdated today

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

bountyapi-mcp

MCP server for BountyAPI — specialist data APIs for AI agents with x402 micropayment support.

Connect AI agents (Claude Desktop, Cursor, etc.) to BountyAPI endpoints at https://bountyapi.com. Free endpoints work out of the box. Paid endpoints require a funded wallet — the agent pays automatically per request.

Quick Start

Free tools only (no wallet needed)

"mcpServers": { "bounty": { "command": "npx", "args": ["bountyapi-mcp"] } } }

With payment support (paid endpoints auto-pay)

Create a burner wallet on Base with $2-5 of USDC
Export the private key
Configure:

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

Or via CLI:

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

Then ask your AI:

"What's the stamp duty for a $1.5M property in Singapore for a Singapore Citizen buying their first home?"

"Search for recent HDB resale transactions in Tampines, 4 ROOM only"

"What's the rental yield on a $1.2M condo renting at $4,200/month?"

How Payments Work

When an agent calls a paid endpoint:

Server returns 402 Payment Required with payment instructions
MCP server reads the price and checks against MAX_SPEND_USD
If within limit, it signs a USDC transfer on Base and retries
Server verifies payment via facilitator and returns data
Settlement is logged with a Basescan transaction link

The agent never sees the payment — it just gets the data. Cost: ~$0.01 per paid call.

Available Tools

sg_stamp_duty (FREE)

Calculate Singapore property stamp duty (BSD + ABSD).

Buyer profiles: SC, SPR, FR, entity, developer, trustee
Returns total duty, effective rate, and tier-by-tier breakdown
Source: IRAS (iras.gov.sg)

sg_postal_lookup (FREE)

Look up Singapore postal code to district.

All 28 postal districts with area names
Returns district number, name, and areas

sg_rental_yield (PAID)

Calculate rental investment metrics.

Gross yield, net yield, cap rate
Price-to-rent ratio, monthly cashflow, years to break even

hdb_resale_median (PAID)

Get HDB resale price data by town.

All 26 HDB towns
Median prices by flat type (2 ROOM through EXECUTIVE)
Sampled transaction aggregates from data.gov.sg

hdb_resale_search (PAID)

Search HDB resale transactions with filters.

Filter by town, flat type, price range
Returns individual transaction records

Environment Variables

Variable	Default	Description
`EVM_PRIVATE_KEY`	_(none)_	Base wallet private key for automatic payments
`MAX_SPEND_USD`	`1.00`	Max USDC to spend per single request
`BOUNTY_API_URL`	`https://bountyapi.com`	API base URL

Safety

Never use your main wallet. Create a dedicated burner wallet with only a few dollars of USDC on Base.
The MAX_SPEND_USD limit prevents unexpected charges — each request is checked before payment.
Private keys are never logged or transmitted to the API server. They only sign local payment authorizations.

Development

npm install

npm run build node dist/index.js

License

MIT

Bounty API

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Accounting, finance & taxi

Common questions

Alternatives

Finance Toolkit

SolidInvoice

Korea Tax Calculator

README from the maker

bountyapi-mcp

Quick Start

Free tools only (no wallet needed)

With payment support (paid endpoints auto-pay)

How Payments Work

Available Tools

sg_stamp_duty (FREE)

sg_postal_lookup (FREE)

sg_rental_yield (PAID)

hdb_resale_median (PAID)

hdb_resale_search (PAID)

Environment Variables

Safety

Development

License