Claude API
Claude API is Anthropic's REST API for programmatic access to Claude models, including Messages, streaming, tool use, files, model listing, and related platform features.
Overview
The Claude API is served from api.anthropic.com and uses API keys for authentication. Anthropic provides official client SDKs for Python, TypeScript, C#, Go, Java, PHP, and Ruby.
API details
- Base URL
- https://api.anthropic.com/
- Authentication
- Api Key
- Styles
- Rest, Sdk
- Pricing model
- Usage Based
- Official SDKs
- Python, TypeScript, C#, Go, Java, PHP, Ruby
Capabilities
Usage pricing depends on the selected model and API features.
Models currently mapped to this API
This is the verified iilib subset, not the provider's complete model catalog.
Claude Fable 5.1
Claude Fable 5.1 is an Anthropic model for demanding reasoning and long-horizon agentic work, with a one-million-token context window and up to 128K output tokens.
Claude Opus 5.5
Claude Opus 5.5 is Anthropic's current Opus model for long-running agentic coding and knowledge work, with a 1M-token context window.
Claude Sonnet 5.5
Claude Sonnet 5.5 is an Anthropic model released in September 2026 with a one-million-token context window, text and image input, and text output.
Tools and agents integrating this API
Only integrations backed by explicit product or provider documentation are shown.
Aider
Aider is an open-source terminal tool for working with language models on an existing codebase. It builds a repository map, edits files, integrates with Git, and can run linting and tests.
Amp
Amp is a coding agent from Amp Frontier Corporation that runs in the terminal, on the web, in cloud orbs, and through desktop and mobile apps, with integrations for common code editors.
Cline
Cline is an open-source coding agent available as an IDE extension, command-line tool, and SDK. It can read and write files, run terminal commands, and use browser and external tools.
Cursor
Cursor is a code editor from Anysphere with code completion and agents that can inspect repositories, edit files, run terminal commands, and work from desktop, terminal, or web surfaces.
Droid
Droid is Factory's software-development agent for planning, implementing, reviewing, and validating code changes across desktop, terminal, web, and managed execution environments.
Junie
Junie is JetBrains' coding agent for JetBrains IDEs and the command line. It can inspect projects, write and modify code, run development tasks, and use project instructions and agent skills.
OpenCode
OpenCode is an open-source coding agent available through a terminal interface, desktop app, and IDE integrations, with support for multiple model providers and local models.
OpenHands
OpenHands is an open-source platform for running software-development agents locally, in hosted cloud environments, or through self-hosted deployments.
Pi
Pi is an open-source, extensible terminal coding agent from Earendil Works with multi-provider model access, local tools, skills, extensions, prompt templates, and SDK support.
Qwen Code
Qwen Code is an open-source coding agent from the Qwen team with terminal, editor, desktop, browser, and chat surfaces and support for Qwen and third-party model providers.
Zed
Zed is an open-source code editor from Zed Industries with a native coding agent, external agent integrations, terminal-backed agent threads, edit prediction, and multiplayer collaboration.