AgentPay

Pay-per-call AI microservices via x402. USDC on Base, no accounts - wallet is auth.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "agentpay-3": {
      "command": "npx",
      "args": [
        "-y",
        "agentpay-3"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

AgentPay — agentpay.help

Machine-payable AI microservices via the 402 Payment Required protocol (x402 / MPP)

No accounts. No API keys. No OAuth. Pay per call in USDC on Base.

AgentPay is an open-source reference implementation of the Machine Payments Protocol — wrapping local AI models behind an HTTP 402 paywall so that AI agents (and humans) can pay for compute on a per-request basis using stablecoins.

Built with Express 5, @x402/express, and Ollama-served Gemma models. Live on Base mainnet with the PayAI facilitator.

Quick Start
Architecture
Services & Pricing
Tech Stack
Deployment
API Reference
Configuration
Contributing
License

Quick Start

Prerequisites

Node.js ≥ 20
Ollama running locally with the required model pulled
A wallet private key (for receiving payments)

1. Clone & install

bash

git clone https://github.com/your-org/AgentPay.git
cd AgentPay
npm install

2. Pull the AI model

bash

ollama pull gemma3:1b
# Or use a larger model for better quality:
# ollama pull gemma4:31b-cloud

3. Configure

bash

cp .env.example .env
# Edit .env — set SELLER_ADDRESS to your wallet address

4. Start the server

Terminal

npm start
# AgentPay listening on :4021
#   payTo:   0xYourWalletAddress
#   network: eip155:84532 (Base Sepolia testnet)
#   facilitator: https://x402.org/facilitator

5. Test a paid request

bash

# Unpaid request → HTTP 402 (paywall)
curl -s -o /dev/null -w "%{http_code}" -X POST https://agentpay.help/v1/summarize \
  -H 'Content-Type: application/json' \
  -d '{"text":"Machine Payments Protocol lets AI agents pay for API calls using the HTTP 402 status code."}'
# → 402

# Automated test (requires buyer wallet with USDC)
npm run test:402

6. Buy a service (buyer client)

bash

# Set your buyer private key in .env
echo "BUYER_PK=0xYourPrivateKey" >> .env

# Run the buyer script
npm run buyer -- /v1/summarize ./payload.json

Architecture

Code

┌─────────────────────────────────────────────────────────────────┐
│                        AgentPay Architecture                   │
├─────────────────────────────────────────────────────────────────┤
│                                                                 │
│  ┌──────────┐    HTTP POST     ┌───────────────────────────┐    │
│  │  Client   │ ──────────────► │      Express 5 Server     │    │
│  │ (Agent /  │   (no auth)     │        (port 4021)        │    │
│  │  Human)   │                 │                           │    │
│  └──────────┘                 │  ┌─────────────────────┐  │    │
│       │                       │  │   Payment Middleware  │  │    │
│       │                       │  │   (@x402/express)    │  │    │
│       │                       │  │                      │  │    │
│       │  ◄── HTTP 402 ───────│  │  • Validates x402    │  │    │
│       │      (paywall)        │  │    payment headers   │  │    │
│       │                       │  │  • Verifies on-chain │  │    │
│       │  ──── signed payment ►│  │    via facilitator   │  │    │
│       │      (USDC)           │  │                      │  │    │
│       │                       │  └──────────┬──────────┘  │    │
│       │  ◄── 200 OK ─────────│             │              │    │
│       │      (result JSON)    │  ┌──────────▼──────────┐  │    │
│       │                       │  │   Service Handlers   │  │    │
│       │                       │  │                      │  │    │
│       │                       │  │  /v1/summarize       │  │    │
│       │                       │  │  /v1/classify-ins    │  │    │
│       │                       │  │  /v1/extract         │  │    │
│       │                       │  └──────────┬──────────┘  │    │
│       │                       └─────────────┼─────────────┘    │
│       │                                     │                   │
│       │                              ┌──────▼──────┐           │
│       │                              │   Ollama     │           │
│       │                              │  (local LLM) │           │
│       │                              │  gemma3:1b   │           │
│       │                              └─────────────┘           │
│       │                                                         │
│  ┌────▼────────────────────────────────────────────────────┐    │
│  │                  Payment Flow (x402)                    │    │
│  │                                                         │    │
│  │  Client ──► HTTP 402 ──► Facilitator ──► On-Chain ──►   │    │
│  │                │         (PayAI)       Base Mainnet     │    │
│  │                ▼                         (USDC)         │    │
│  │          Payment Required                                │    │
│  │          (price + accepts[])                             │    │
│  └─────────────────────────────────────────────────────────┘    │
│                                                                 │
│  ┌─────────────────────────────────────────────────────────┐    │
│  │  Free Endpoints (no paywall)                            │    │
│  │  • /              — Landing page (HTML)                 │    │
│  │  • /health        — Health check                        │    │
│  │  • /stats         — Revenue & usage stats               │    │
│  │  • /.well-known/x402 — Machine-readable service catalog │    │
│  └─────────────────────────────────────────────────────────┘    │
│                                                                 │
│  ┌─────────────────────────────────────────────────────────┐    │
│  │  Data Layer                                             │    │
│  │  • data/ledger.json — Append-only payment ledger        │    │
│  └─────────────────────────────────────────────────────────┘    │
└─────────────────────────────────────────────────────────────────┘

How it works:

Client sends POST /v1/summarize (or any paid endpoint) — no auth headers needed
Payment middleware intercepts, returns HTTP 402 with pricing info (accepts[])
Client constructs a USDC payment, signs it, attaches X-PAYMENT header
Facilitator verifies the payment on Base mainnet
Middleware grants access → request proceeds to the service handler
Handler calls Ollama, returns AI-generated result as JSON

Services & Pricing

Endpoint	Price	Description
`POST /v1/summarize`	$0.01	Summarize text (200–20,000 chars). Returns a ~250-word summary.
`POST /v1/classify-insurance`	$0.02	Classify insurance leads: intent, urgency, line-of-business, confidence score.
`POST /v1/sentiment`	$0.02	Sentiment analysis: positive/negative/neutral with emotions and keywords.
`POST /v1/extract`	$0.03	Extract structured key-value fields from raw text (emails, forms, documents).
`POST /v1/translate`	$0.03	Text translation to any language.
`POST /v1/code-review`	$0.05	AI code review: bugs, security issues, performance, quality analysis.
`POST /v1/insurance-analysis`	$0.10	⭐ FULL BUNDLE — classification + extraction + summary in one call.

All services accept USDC on Base mainnet (chain ID 8453) via the exact payment scheme. Testnet (Base Sepolia) is available via configuration.

Tech Stack

Component	Technology
Runtime	Node.js ≥ 20 (ESM)
HTTP Server	Express 5.2
Payment Protocol	`@x402/express` 2.22, `@x402/evm`, `@x402/fetch`, `@x402/extensions`
Blockchain	Base (OP Stack L2), USDC stablecoin
Facilitator	PayAI x402 facilitator (`x402.org/facilitator`)
AI Runtime	Ollama (local inference)
LLM	Gemma 3 1B (default) / Gemma 4 31B (recommended)
Wallet	`viem` (Ethereum client library)
Config	dotenv

Deployment

Local Development

bash

# Base Sepolia testnet (recommended for development)
cp .env.example .env
# Edit .env: PAYMENT_NETWORK=eip155:84532
npm start

Production (Base Mainnet)

bash

# Edit .env for mainnet
PAYMENT_NETWORK=eip155:8453       # Base mainnet
SELLER_ADDRESS=0xYourMainnetWallet
OLLAMA_URL=http://127.0.0.1:11434
MODEL_SUMMARIZE=gemma4:31b-cloud  # Use larger model for quality
MODEL_CLASSIFY=gemma4:31b-cloud
MODEL_EXTRACT=gemma4:31b-cloud

Docker (recommended for production)

Dockerfile

FROM node:20-slim
WORKDIR /app
COPY package*.json ./
RUN npm ci --omit=dev
COPY src/ ./src/
COPY data/ ./data/
EXPOSE 4021
HEALTHCHECK CMD curl -f https://agentpay.help/health || exit 1
CMD ["node", "src/server.js"]

Environment Variables

Variable	Required	Default	Description
`PORT`	No	`4021`	Server port
`SELLER_ADDRESS`	Yes	—	Wallet address to receive USDC payments
`PAYMENT_NETWORK`	No	`eip155:84532`	Blockchain network (`eip155:8453` for mainnet)
`FACILITATOR_URL`	No	`https://x402.org/facilitator`	x402 facilitator endpoint
`OLLAMA_URL`	No	`http://127.0.0.1:11434`	Ollama API base URL
`MODEL_SUMMARIZE`	No	`gemma3:1b`	Model for summarize endpoint
`MODEL_CLASSIFY`	No	`gemma3:1b`	Model for classify-insurance endpoint
`MODEL_EXTRACT`	No	`gemma3:1b`	Model for extract endpoint
`PUBLIC_URL`	No	—	Public URL for discovery metadata

API Reference

Free Endpoints

`GET /`

Landing page with service catalog and usage stats.

`GET /health`

Health check.

config.json

{ "ok": true, "ts": "2025-01-01T00:00:00.000Z" }

`GET /stats`

Revenue and usage statistics.

Read the full README →View source on GitHub →

Related MCP Servers

View all in Finance & Fintech View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about AgentPay

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "agentpay": { "command": "npx", "args": ["-y", "AgentPay"] } }

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Technical Specs & Signals

CategoryFinance & Fintech

27Quality signal: Emerging · 27/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20

Documentation & tools11/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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AllMCPs Server

The official MCP server for AllMCPs.com - submit and manage tools directly from your AI. The open directory for MCP servers. Connect Claude, Cursor, Windsurf, and AI agents to databases, tools, files, and APIs. Explore 10,000+ servers. AllMCPs is the premier, open directory for discovering, evaluating, and installing Model Context Protocol (MCP) servers to equip AI agents and LLMs with real-world superpowers.

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More in 💰 Finance & Fintech →Best MCP servers for Finance & Fintech →Alternatives to AgentPay →Install in Claude Desktop Install in Cursor Install in VS Code

AgentPay

Pay-per-call AI microservices via x402. USDC on Base, no accounts - wallet is auth.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "agentpay-3": {
      "command": "npx",
      "args": [
        "-y",
        "agentpay-3"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

AgentPay — agentpay.help

Machine-payable AI microservices via the 402 Payment Required protocol (x402 / MPP)

No accounts. No API keys. No OAuth. Pay per call in USDC on Base.

Built with Express 5, @x402/express, and Ollama-served Gemma models. Live on Base mainnet with the PayAI facilitator.

Quick Start
Architecture
Services & Pricing
Tech Stack
Deployment
API Reference
Configuration
Contributing
License

Quick Start

Prerequisites

Node.js ≥ 20
Ollama running locally with the required model pulled
A wallet private key (for receiving payments)

1. Clone & install

bash

git clone https://github.com/your-org/AgentPay.git
cd AgentPay
npm install

2. Pull the AI model

bash

ollama pull gemma3:1b
# Or use a larger model for better quality:
# ollama pull gemma4:31b-cloud

3. Configure

bash

cp .env.example .env
# Edit .env — set SELLER_ADDRESS to your wallet address

4. Start the server

Terminal

npm start
# AgentPay listening on :4021
#   payTo:   0xYourWalletAddress
#   network: eip155:84532 (Base Sepolia testnet)
#   facilitator: https://x402.org/facilitator

5. Test a paid request

bash

# Unpaid request → HTTP 402 (paywall)
curl -s -o /dev/null -w "%{http_code}" -X POST https://agentpay.help/v1/summarize \
  -H 'Content-Type: application/json' \
  -d '{"text":"Machine Payments Protocol lets AI agents pay for API calls using the HTTP 402 status code."}'
# → 402

# Automated test (requires buyer wallet with USDC)
npm run test:402

6. Buy a service (buyer client)

bash

# Set your buyer private key in .env
echo "BUYER_PK=0xYourPrivateKey" >> .env

# Run the buyer script
npm run buyer -- /v1/summarize ./payload.json

Architecture

Code

┌─────────────────────────────────────────────────────────────────┐
│                        AgentPay Architecture                   │
├─────────────────────────────────────────────────────────────────┤
│                                                                 │
│  ┌──────────┐    HTTP POST     ┌───────────────────────────┐    │
│  │  Client   │ ──────────────► │      Express 5 Server     │    │
│  │ (Agent /  │   (no auth)     │        (port 4021)        │    │
│  │  Human)   │                 │                           │    │
│  └──────────┘                 │  ┌─────────────────────┐  │    │
│       │                       │  │   Payment Middleware  │  │    │
│       │                       │  │   (@x402/express)    │  │    │
│       │                       │  │                      │  │    │
│       │  ◄── HTTP 402 ───────│  │  • Validates x402    │  │    │
│       │      (paywall)        │  │    payment headers   │  │    │
│       │                       │  │  • Verifies on-chain │  │    │
│       │  ──── signed payment ►│  │    via facilitator   │  │    │
│       │      (USDC)           │  │                      │  │    │
│       │                       │  └──────────┬──────────┘  │    │
│       │  ◄── 200 OK ─────────│             │              │    │
│       │      (result JSON)    │  ┌──────────▼──────────┐  │    │
│       │                       │  │   Service Handlers   │  │    │
│       │                       │  │                      │  │    │
│       │                       │  │  /v1/summarize       │  │    │
│       │                       │  │  /v1/classify-ins    │  │    │
│       │                       │  │  /v1/extract         │  │    │
│       │                       │  └──────────┬──────────┘  │    │
│       │                       └─────────────┼─────────────┘    │
│       │                                     │                   │
│       │                              ┌──────▼──────┐           │
│       │                              │   Ollama     │           │
│       │                              │  (local LLM) │           │
│       │                              │  gemma3:1b   │           │
│       │                              └─────────────┘           │
│       │                                                         │
│  ┌────▼────────────────────────────────────────────────────┐    │
│  │                  Payment Flow (x402)                    │    │
│  │                                                         │    │
│  │  Client ──► HTTP 402 ──► Facilitator ──► On-Chain ──►   │    │
│  │                │         (PayAI)       Base Mainnet     │    │
│  │                ▼                         (USDC)         │    │
│  │          Payment Required                                │    │
│  │          (price + accepts[])                             │    │
│  └─────────────────────────────────────────────────────────┘    │
│                                                                 │
│  ┌─────────────────────────────────────────────────────────┐    │
│  │  Free Endpoints (no paywall)                            │    │
│  │  • /              — Landing page (HTML)                 │    │
│  │  • /health        — Health check                        │    │
│  │  • /stats         — Revenue & usage stats               │    │
│  │  • /.well-known/x402 — Machine-readable service catalog │    │
│  └─────────────────────────────────────────────────────────┘    │
│                                                                 │
│  ┌─────────────────────────────────────────────────────────┐    │
│  │  Data Layer                                             │    │
│  │  • data/ledger.json — Append-only payment ledger        │    │
│  └─────────────────────────────────────────────────────────┘    │
└─────────────────────────────────────────────────────────────────┘

How it works:

Client sends POST /v1/summarize (or any paid endpoint) — no auth headers needed
Payment middleware intercepts, returns HTTP 402 with pricing info (accepts[])
Client constructs a USDC payment, signs it, attaches X-PAYMENT header
Facilitator verifies the payment on Base mainnet
Middleware grants access → request proceeds to the service handler
Handler calls Ollama, returns AI-generated result as JSON

Services & Pricing

Endpoint	Price	Description
`POST /v1/summarize`	$0.01	Summarize text (200–20,000 chars). Returns a ~250-word summary.
`POST /v1/classify-insurance`	$0.02	Classify insurance leads: intent, urgency, line-of-business, confidence score.
`POST /v1/sentiment`	$0.02	Sentiment analysis: positive/negative/neutral with emotions and keywords.
`POST /v1/extract`	$0.03	Extract structured key-value fields from raw text (emails, forms, documents).
`POST /v1/translate`	$0.03	Text translation to any language.
`POST /v1/code-review`	$0.05	AI code review: bugs, security issues, performance, quality analysis.
`POST /v1/insurance-analysis`	$0.10	⭐ FULL BUNDLE — classification + extraction + summary in one call.

All services accept USDC on Base mainnet (chain ID 8453) via the exact payment scheme. Testnet (Base Sepolia) is available via configuration.

Tech Stack

Component	Technology
Runtime	Node.js ≥ 20 (ESM)
HTTP Server	Express 5.2
Payment Protocol	`@x402/express` 2.22, `@x402/evm`, `@x402/fetch`, `@x402/extensions`
Blockchain	Base (OP Stack L2), USDC stablecoin
Facilitator	PayAI x402 facilitator (`x402.org/facilitator`)
AI Runtime	Ollama (local inference)
LLM	Gemma 3 1B (default) / Gemma 4 31B (recommended)
Wallet	`viem` (Ethereum client library)
Config	dotenv

Deployment

Local Development

bash

# Base Sepolia testnet (recommended for development)
cp .env.example .env
# Edit .env: PAYMENT_NETWORK=eip155:84532
npm start

Production (Base Mainnet)

bash

# Edit .env for mainnet
PAYMENT_NETWORK=eip155:8453       # Base mainnet
SELLER_ADDRESS=0xYourMainnetWallet
OLLAMA_URL=http://127.0.0.1:11434
MODEL_SUMMARIZE=gemma4:31b-cloud  # Use larger model for quality
MODEL_CLASSIFY=gemma4:31b-cloud
MODEL_EXTRACT=gemma4:31b-cloud

Docker (recommended for production)

Dockerfile

FROM node:20-slim
WORKDIR /app
COPY package*.json ./
RUN npm ci --omit=dev
COPY src/ ./src/
COPY data/ ./data/
EXPOSE 4021
HEALTHCHECK CMD curl -f https://agentpay.help/health || exit 1
CMD ["node", "src/server.js"]

Environment Variables

Variable	Required	Default	Description
`PORT`	No	`4021`	Server port
`SELLER_ADDRESS`	Yes	—	Wallet address to receive USDC payments
`PAYMENT_NETWORK`	No	`eip155:84532`	Blockchain network (`eip155:8453` for mainnet)
`FACILITATOR_URL`	No	`https://x402.org/facilitator`	x402 facilitator endpoint
`OLLAMA_URL`	No	`http://127.0.0.1:11434`	Ollama API base URL
`MODEL_SUMMARIZE`	No	`gemma3:1b`	Model for summarize endpoint
`MODEL_CLASSIFY`	No	`gemma3:1b`	Model for classify-insurance endpoint
`MODEL_EXTRACT`	No	`gemma3:1b`	Model for extract endpoint
`PUBLIC_URL`	No	—	Public URL for discovery metadata

API Reference

Free Endpoints

`GET /`

Landing page with service catalog and usage stats.

`GET /health`

Health check.

config.json

{ "ok": true, "ts": "2025-01-01T00:00:00.000Z" }

`GET /stats`

Revenue and usage statistics.

Read the full README →View source on GitHub →

Related MCP Servers

View all in Finance & Fintech View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about AgentPay

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "agentpay": { "command": "npx", "args": ["-y", "AgentPay"] } }

AllMCPs Directory Badge

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[![AllMCPs](https://allmcps.com/api/badge/agentpay-3?style=directory)](https://allmcps.com/mcp/agentpay-3)

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<a href="https://allmcps.com/mcp/agentpay-3"><img src="https://allmcps.com/api/badge/agentpay-3?style=directory" alt="AgentPay on AllMCPs" /></a>

Technical Specs & Signals

CategoryFinance & Fintech

27Quality signal: Emerging · 27/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20

Documentation & tools11/30

Adoption & activity1/15

Community engagement0/10

★ Featured

AllMCPs Server

Explore Server →

Own this project?

Free dofollow backlink: add your website and place the AllMCPs badge on it — no claim needed. We detect it automatically and keep it verified as long as the badge stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 💰 Finance & Fintech →Best MCP servers for Finance & Fintech →Alternatives to AgentPay →Install in Claude Desktop Install in Cursor Install in VS Code

AgentPay

Quick Install

Client Config & Setup

Documentation Overview

AgentPay — agentpay.help

Table of Contents

Quick Start

Prerequisites

1. Clone & install

2. Pull the AI model

3. Configure

4. Start the server

5. Test a paid request

6. Buy a service (buyer client)

Architecture

Services & Pricing

Tech Stack

Deployment

Local Development

Production (Base Mainnet)

Docker (recommended for production)

Environment Variables

API Reference

Free Endpoints

GET /

GET /health

GET /stats

Related MCP Servers

Reviews

Frequently Asked Questions about AgentPay

AllMCPs Directory Badge

Technical Specs & Signals

AllMCPs Server

Own this project?

Share & Embed

Explore more

AgentPay

Quick Install

Client Config & Setup

Documentation Overview

AgentPay — agentpay.help

Table of Contents

Quick Start

Prerequisites

1. Clone & install

2. Pull the AI model

3. Configure

4. Start the server

5. Test a paid request

6. Buy a service (buyer client)

Architecture

Services & Pricing

Tech Stack

Deployment

Local Development

Production (Base Mainnet)

Docker (recommended for production)

Environment Variables

API Reference

Free Endpoints

GET /

GET /health

GET /stats

Related MCP Servers

Reviews

Frequently Asked Questions about AgentPay

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Technical Specs & Signals

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`GET /`

`GET /health`

`GET /stats`

`GET /`

`GET /health`

`GET /stats`