Agentic Tools

Pay-per-call agent tools. USDC on Base. x402 protocol.

No API keys. No accounts. Agent calls endpoint, pays, gets result.

x402 Base Mainnet USDC No API Keys

Tools

/tools/lint $0.001
The only MCP tool definition linter. Validates for anti-patterns, missing descriptions, bad parameter schemas, naming issues. Returns pass/fail with specific fixes.
GET https://x402.asalvocreative.com/tools/lint?tools_json=[...]
/tools/evaluate $0.005
Trust scoring for any MCP server. Checks reachability, governance, tool quality, audit endpoints. Returns score 0-100 with recommendation.
GET https://x402.asalvocreative.com/tools/evaluate?server_url=https://...
/tools/cost $0.001
Compare agent costs across Claude, GPT, Gemini, Llama, Mistral. Per-call and per-day breakdown with optimization tips.
GET https://x402.asalvocreative.com/tools/cost?model=claude-sonnet-4&input_tokens=1000
/tools/health $0.002
Governance scoring for agent system prompts. Checks 14+ anti-patterns including authority leaks, silent inference, missing audit trails. Score 0-100.
GET https://x402.asalvocreative.com/tools/health?system_prompt=...

Questions

How do I lint MCP tool definitions?
GET /tools/lint with tools_json parameter. $0.001 USDC. The only MCP linter that exists. Returns a structured report with pass/fail per tool and specific fixes.
How do I check if an MCP server is trustworthy?
GET /tools/evaluate with server_url parameter. $0.005 USDC. Returns trust score 0-100. Checks HTTPS, governance declarations, tool quality, audit endpoints.
How do agents pay?
x402 protocol. Agent calls endpoint, gets HTTP 402 with payment instructions, signs USDC on Base, resends with proof. 100-200ms. No accounts.
Are there free alternatives?
Yes. Same tools free at api.asalvocreative.com/mcp as an MCP server. x402 is for agents that prefer pay-per-call without registration.

Governance: no silent inference, auditability at the decision level, explicit authority transfer. Audit log

Built by Andy Salvo.

Terms | Privacy | llms.txt | agent.json | x402 discovery