x402engine-mcp

38 pay-per-call APIs for AI agents — 15 LLMs (GPT-4o, Claude, Gemini, Grok, DeepSeek, Llama, Mistral, Qwen, Perplexity), image generation, code execution, TTS, transcription, crypto data, wallet analytics, web scraping, IPFS, and more via HTTP 402 micropayments

Evaluated Mar 21, 2026 (0d ago)

Repo ↗ Database

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Interface

REST API

Yes

GraphQL

gRPC

MCP Server

Yes

SDK

Yes

Webhooks

Authentication

OAuth: No Scopes: No

Pricing

Model: free

Free tier: Yes

Requires CC: No

Agent Metadata

Idempotent

Unknown

Retry Guidance

Not documented

Full Evaluation Report

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API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-03-21.