# Otto AI x402
> Pay-per-call AI services for autonomous agents — market intelligence, DeFi execution, and creative tools. Crypto micropayments via x402 V2 — USDC on Base on every endpoint, Solana USDC on 66 of 84 (each route's 402 `accepts[]`, returned in both the PAYMENT-REQUIRED header and the JSON body, is definitive). From $0.001 per call.

## Endpoints
- [Service manifest (text)](https://x402.ottoai.services/llm.txt): the full pay-per-call catalog with prices, methods, and one-line descriptions per endpoint.
- [Service manifest (full)](https://x402.ottoai.services/llms-full.txt): the same catalog as a single fetch — endpoints, prices, integration notes, and discovery URLs inlined for agents that prefer one round-trip.
- [Wallet MCP intelligence catalog (JSON)](https://x402.ottoai.services/otto-x402-catalog.json): the curated intelligence subset Otto's Wallet MCP (formerly Base MCP) skill uses, with compact call hints. Use OpenAPI for the full HTTP catalog, including execution and creative services outside this subset.
- [OpenAPI spec](https://x402.ottoai.services/openapi.json): OpenAPI 3.1 description of every callable endpoint.
- [Otto skill for Wallet MCP](https://x402.ottoai.services/otto.md): markdown skill an agent adds to Wallet MCP (formerly Base MCP) to pay Otto's read-only intelligence from Coinbase Wallet, approving each call.
- [Coinbase for Agents](https://docs.cdp.coinbase.com/ai-agents/coinbase-for-agents/coinbase-mcp): recommended for actions from a Coinbase account. Its one-call x402 fetch covers only Coinbase's curated catalog, which does not list Otto; use the Wallet MCP skill, Otto Intel MCP or any x402 client for Otto.

## Discovery
- [x402 manifest](https://x402.ottoai.services/.well-known/x402): the x402 V2 paywall metadata (accepted networks, pricing scheme, signers).
- [Agent capability manifest](https://x402.ottoai.services/.well-known/agent.json): identity, pointers, and the Open Router capabilities (discover / full-auto / feedback).
- [Internet Court manifest (skill.md)](https://x402.ottoai.services/skill.md): Otto's Internet Court (internetcourt.org) conformance — ERC-8004 identity, ACP escrow, x402 payment, execution-evidence receipts, and the bring-your-own-arbiter dispute flow, declared layer by layer.
- [Execution-evidence receipts (free)](https://x402.ottoai.services/receipts/v1/{rail}/{chainId}/{contract}/{jobId}): retrieve a completed job's on-chain locator + verifiability verdict (rails: acp-v1, acp-v2; x402 receipts are in-band). No payment, not in the paid catalog.
- [AGENTS.md](https://x402.ottoai.services/AGENTS.md): agent-readable capability manifest — the Router loop, honesty boundary, and pointers.
- [MCP pointer](https://x402.ottoai.services/.well-known/mcp.json): links to the Wallet MCP skill and the separate hosted Otto Intel MCP integration.
- [Otto Intel MCP](https://docs.useotto.xyz/acp-swarm/otto-intel-mcp): connect to the hosted Streamable HTTP server at https://mcp.ottoai.services/mcp. Its curated tools and transaction preparation contracts differ from the full x402 HTTP catalog.
- [Muse setup](https://useotto.xyz/skill.md): Otto's skill for Muse agents, on the brand host. Research access, payment budgets and trades have separate permissions.
- [Agent permissions](https://x402.ottoai.services/.well-known/agent-permissions.json): read-only crawl scope + rate limit + rules of engagement (las-wg/agent-permissions.json schema).

## Buyer guides
- [SEC filings and company fundamentals](https://docs.useotto.xyz/intelligence-guides/sec-filings-api): choose a company report, financial statements or a filing feed; understand source coverage and missing data.
- [Tokenized stock data](https://docs.useotto.xyz/intelligence-guides/tokenized-stock-data): distinguish underlying stock data, token registries and executable-price samples.
- [Web search and answers](https://docs.useotto.xyz/intelligence-guides/web-search-and-answers): choose search results, a cited answer, page extraction or a research response.
- [AI image generation and editing](https://docs.useotto.xyz/intelligence-guides/image-generation): request a generated image or edit with the existing /generate-meme API.

## Brand
- [Otto AI](https://useotto.xyz): the autonomous-finance agent ecosystem (brand root).
- [Documentation](https://docs.useotto.xyz): public docs (concepts, integration, agent rosters).
- [Twitter / X](https://twitter.com/useOttoAI): announcements and operator updates.