Orthogonal
Orthogonal is a unified API and payment layer for AI agents, backed by Pantera Capital and Y Combinator. An agent describes what it needs in natural language and Orthogonal returns the right service from a catalog of 40+ third-party APIs (web search, data enrichment, scraping, email finding/verification, identity), then proxies the call and meters a per-call price. Access is available through a REST API (api.orthogonal.com), a TypeScript SDK (@orth/sdk), a Python SDK (orth), a CLI (@orth/cli), and an official hosted MCP server (mcp.orthogonal.com) for Claude, Cursor, and other agents. Billing is prepaid credits or pay-per-call stablecoin micropayments over x402 (USDC on Base) and MPP (USDC.e on Tempo). Orthogonal also publishes an open library of 88 installable Agent Skills.
Orthogonal publishes 3 APIs on the APIs.io network: Account API, Discovery API, and Run API. Tagged areas include Company, AI Agents, API Discovery, API Marketplace, and Agent Payments.
Orthogonal’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, CLI, authentication, and 22 more developer resources.
Kin Score
APIs 3
Individual APIs this provider publishes, each with its own machine-readable definition.
Orthogonal Account API
Credit balance, usage, and transaction history.
Orthogonal Discovery API
Find APIs and endpoints, inspect parameters, and get code snippets.
Orthogonal Run API
Execute a call against any catalog API through Orthogonal.
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
orthogonal-mcp.yml
MCP SERVERSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Resources
Get Started 3
Portal, sign-up, and the first successful call
Documentation 3
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Commercial 3
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 1
Properties that don't map to a standard resource type