# Agentic Tools (x402)

> Agent tools with x402 micropayments. No API keys. Pay per call with USDC on Base mainnet.

## Connection

x402 Endpoint: https://x402.asalvocreative.com
Payment: USDC on Base mainnet via x402 protocol
Receiver: 0x5AbaD121dAbB983E663Fb8D08feA3dcf745aF005
Facilitator: Coinbase CDP

## Paid Tools

### /tools/lint - $0.001 USDC
The only MCP tool definition linter that exists. Validates MCP tool definitions for anti-patterns, missing descriptions, bad parameter schemas, naming issues, and quality problems.
Method: GET
Parameter: tools_json (query string) - MCP tool definitions as JSON array

### /tools/evaluate - $0.005 USDC
Evaluate any MCP service for trustworthiness before using it. Returns a trust score from 0 to 100.
Method: GET
Parameter: server_url (query string) - The MCP server URL to evaluate

### /tools/cost - $0.001 USDC
Compare the cost of running an agent task across Claude, GPT, Gemini, Llama, and Mistral.
Method: GET
Parameters: model, input_tokens, output_tokens, num_calls (query string)

### /tools/health - $0.002 USDC
Score any agent system prompt on governance best practices from 0 to 100.
Method: GET
Parameter: system_prompt (query string)

## How to Pay

1. Send a GET request to any tool endpoint
2. Receive HTTP 402 with PAYMENT-REQUIRED header containing payment instructions
3. Sign a USDC payment on Base using x402 protocol
4. Resend request with PAYMENT-SIGNATURE header
5. Receive tool output

Compatible with any x402 client: @x402/axios, @civic/x402-mcp, Coinbase AgentKit wallets.

## Trust

- Governance invariants: no_silent_inference, auditability_at_decision_level, explicit_authority_transfer
- Agent declaration: https://x402.asalvocreative.com/.well-known/agent.json