Arch Tools — 63 AI Agent Tools in One API (x402, LangChain, MCP)

# Arch Tools > The first API platform built for autonomous agent payments. > 63 production-ready tools. One API key. USDC on 9 chains via x402 or Stripe. > Base URL: https://archtools.dev > Docs: https://archtools.dev/docs > OpenAPI: https://archtools.dev/openapi.json > MCP SSE: https://archtools.dev/mcp/sse > Discovery: https://archtools.dev/v1/tools > Agent Card: https://archtools.dev/.well-known/agent.json > GitHub: https://github.com/Deesmo/Arch-AI-Tools ## Authentication All tool endpoints require an API key: Authorization: Bearer YOUR_API_KEY Get a free key (100 credits — 25 instant, 75 on email verify) at https://archtools.dev/signup ## x402 Autonomous Payment (no key required) AI agents can pay per-call with USDC on Base via the x402 protocol. No API key, no signup, no human credit card needed. Discovery: https://archtools.dev/.well-known/x402 Protocol: https://x402.org ## Credit Pricing - Starter Pack: 3,000 credits — $9 ($0.0030/credit) - Pro Pack: 25,000 credits — $49 ($0.00196/credit) - Business Pack: 125,000 credits — $199 ($0.00159/credit) ## Tool Categories ### AI & NLP - [AI Generate](https://archtools.dev/v1/tools/ai-generate): AI-powered text generation using Claude (20 credits) - [AI Oracle](https://archtools.dev/v1/tools/ai-oracle): AI reasoning engine with standard and deep analysis modes (25 credits) - [Workflow Agent](https://archtools.dev/v1/tools/workflow-agent): Multi-step autonomous AI agent pipeline (25 credits) - [Session Create](https://archtools.dev/v1/tools/session-create): Create a persistent AI conversation session (5 credits) - [Session Message](https://archtools.dev/v1/tools/session-message): Send a message in an existing AI session (20 credits) - [Summarize](https://archtools.dev/v1/tools/summarize): Summarize text in multiple styles: paragraph, bullets, tldr, headline, executive (10 credits) - [Sentiment Analysis](https://archtools.dev/v1/tools/sentiment-analysis): Analyze text sentiment: positive/negative/neutra

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