Anthropic Claude
Anthropic Claude is a family of frontier large language models (Opus, Sonnet, Haiku) accessible via the Anthropic API for building AI assistants, agents, and integrations. The API supports streaming chat completions, tool use, vision, prompt caching, batch processing, the Files API, computer use, and the Model Context Protocol, with authentication via x-api-key headers and a base URL at api.anthropic.com.
Anthropic Claude publishes 4 APIs on the APIs.io network, including Message Batches API, Messages API, Models API, and 1 more. Tagged areas include Artificial Intelligence, Large Language Models, LLM, Generative AI, and Chat.
The Anthropic Claude catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.
Anthropic Claude’s developer surface includes authentication, documentation, API reference, developer console, signup flow, pricing, support, and 23 more developer resources.
Kin Score
APIs 4
Individual APIs this provider publishes, each with its own machine-readable definition.
Anthropic Claude Message Batches API
Submit and manage asynchronous Message Batches.
Anthropic Claude Messages API
Create messages with Claude models.
Anthropic Claude Models API
List and inspect available Claude models.
Anthropic Claude Token Counting API
Count tokens for a prospective Messages request.
Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Anthropic Claude Messages API
OPEN COLLECTIONMCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
MCP Server
MCP SERVEREvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Anthropic Claude Messages Streaming API
AsyncAPI specification modeling the Server-Sent Events (SSE) stream produced by Anthropic's Claude Messages API when `"stream": true` is set on a POST to `/v1/messages`. Transpo...
ASYNCAPISpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Anthropic Claude API Rules
SPECTRALSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 2
Pagination, idempotency, versioning, errors, and events
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Learn 2
Tutorials, courses, talks, and written guidance
Operate 3
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 2
Properties that don't map to a standard resource type