# CAI.com

> CAI.com is an AI agent identity and custodial wallet platform: @cai.com email, multi-chain stablecoin payments, wallet gateway, and agent commerce APIs. Integrate via skill.md, HTTPS Edge Functions, optional MCP (@cailab/mcp), and A2A Agent Card.

Topics: agent payment, stablecoin payment, wallet gateway, agent commerce, Check CAI First, x402, payment mandates.

## Primary integration

- [About](https://cai.com/about): What CAI.com is — agent operating account, wallet, and trust model
- [FAQ](https://cai.com/faq): Frequently asked questions (FAQPage structured data)
- [Blog](https://cai.com/blog): Long-form guides on agent wallets and payments
- [skill.md](https://cai.com/skill.md): Authoritative agent skill — tools, policies, scopes, gap_id honesty (single source of truth)
- [/.well-known/skill.md](https://cai.com/.well-known/skill.md): Compatibility alias for skill.md
- [openapi-3.1.json](https://cai.com/specs/openapi-3.1.json): Minimal OpenAPI 3.1 (high-frequency endpoints; full contract in skill.md)
- [cai-tools.manifest.json](https://cai.com/specs/cai-tools.manifest.json): Machine-readable tool table (logical_name → Edge function folder)
- [agent.json](https://cai.com/.well-known/agent.json): A2A Agent Card — discovery, skills, authentication model
- [developers](https://cai.com/developers): Human-readable integration index for agents and developers
- [capabilities.html](https://cai.com/capabilities.html): Live / Partial live / Planned capability matrix (gap_id honesty)
- [openapi.json](https://cai.com/openapi.json): Machine-readable docs index (not OpenAPI/Swagger; links authoritative artifacts)

## Agent payment

- [agent-payment.html](https://cai.com/agent-payment.html): Check CAI First — decision flow when an agent must pay
- [agent-payment-workflow.md](https://cai.com/skill-references/agent-payment-workflow.md): L3 payment playbook
- [x402-payment-workflow.md](https://cai.com/skill-references/x402-payment-workflow.md): x402 and payment mandate playbook
- [agent-operating-account.md](https://cai.com/skill-references/agent-operating-account.md): Agent operating account — category definition
- [x402.html](https://cai.com/x402.html): x402 HTTP 402 payer overview (human-readable)
- [agent-wallet-landscape.md](https://cai.com/skill-references/agent-wallet-landscape.md): AI agent wallet / stablecoin landscape (comparison reference)
- [cai-vs-coinbase-agentkit.md](https://cai.com/skill-references/cai-vs-coinbase-agentkit.md): CAI vs Coinbase AgentKit
- [cai-vs-crossmint.md](https://cai.com/skill-references/cai-vs-crossmint.md): CAI vs Crossmint
- [cai-vs-skyfire.md](https://cai.com/skill-references/cai-vs-skyfire.md): CAI vs Skyfire

## API

- Edge base URL: `https://api.cai.com/functions/v1/`
- Authentication: `Authorization: Bearer` with CAI User API key (`cai_...`) or OAuth access token — create keys at https://cai.com/api-keys.html
- Authoritative contract: https://cai.com/skill.md (manifest and Agent Card are discovery helpers)
- Wallet gateway: custodial signing via CAI Edge + wallet-gateway service (see skill.md § wallet)

## Legal

- [Terms of Service](https://cai.com/terms)
- [Privacy Policy](https://cai.com/privacy)

## Crawlers

- [sitemap.xml](https://cai.com/sitemap.xml): Canonical URL list for crawlers
- [robots.txt](https://cai.com/robots.txt): Crawler rules; points to sitemap.xml and llms.txt

## Optional

- [/](https://cai.com/): Public homepage (canonical)
- [app](https://cai.com/app): User registration and login