Best Coding agents — API access

The ranking

1. ★ Editor’s pick

   #1GO

   goose

   Open-source local AI agent — desktop app, CLI and ACP server — running on the LLM provider you bring.

   Best forDevs who want an open source coding agent that reuses an existing Claude or ChatGPT plan

   API access: Yes — Two documented programmatic paths exist: the ACP agent over stdio, HTTP or WebSocket with secret-key auth, and a goose-sdk provider library for Rust, Python and Kotlin that is still alpha.“Use the Agent Client Protocol (ACP) to build clients that connect to goose's agent runtime, tools, extensions, and configured models.”Use goose as an ACP agent, opening paragraph · checked 2026-09-16

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2. #2JU

   Junie

   JetBrains coding agent for the terminal, JetBrains IDEs and CI, running on hosted or your own model keys.

   Best forDevelopers and teams already standardized on a JetBrains IDE who want an agent that shares the same debugger, project index, and version control already built into their editor.

   API access: Yes — You drive it from your own stack through the headless CLI with an API-key token, plus an ACP mode and a GitHub Action; there is no REST API for the agent itself.“Junie CLI requires an authentication token to run. To generate the token, go to junie.jetbrains.com/cli.”Headless mode page, Authentication token section · checked 2026-09-18

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3. #3MC

   Muse Code

   Meta's terminal and CI coding agent, built on the Muse Spark model.

   Best forCost-sensitive teams willing to trade code privacy for Contributor tier's roughly 12x cheaper input and 21x cheaper output, or anyone with a large multi-part refactor that benefits from several sub-agents working in parallel isolated worktrees.

   API access: Yes — Beyond the CLI, a versioned session protocol plus a published TypeScript SDK lets your own program drive a Muse Code session; the underlying model is separately callable over the Model API.“you can drive a Muse Code session from your own program over a stable, versioned session protocol. `muse serve` runs the protocol, and `muse schema` prints its JSON schema.”Drive it from your own program section · checked 2026-09-20

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5. #4WA

   Warp

   Agentic development environment: a terminal, a standalone agent CLI, and unattended cloud coding agents.

   Best forDevelopers and teams who want one open platform that runs and coordinates multiple coding agents (Claude Code, Codex, Gemini CLI, Warp Agent) side by side across terminal, CLI and cloud, with shared team context and programmatic API access to cloud agent runs.

   API access: Yes — A REST API with a published OpenAPI spec creates and inspects cloud agent runs, with official Python and TypeScript SDKs; a separate read-only analytics API is Enterprise-only.“The Oz API & SDK lets you create, monitor, and inspect cloud agent runs programmatically. Use the REST API from any HTTP client, or the official Python and TypeScript SDKs”Opening paragraph under "Oz API & SDK reference" · checked 2026-09-03

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6. #5AC

   Antigravity CLI

   Google's terminal agent: a keyboard-driven TUI that edits code, spawns subagents and gates every tool call.

   Best forDevelopers already inside the Google ecosystem (Google AI subscription, GCP billing) who want a free terminal agent with Gemini, Claude and gpt-oss model access, especially anyone migrating off a now-sunset Gemini CLI workflow.

   API access: Yes — Headless runs return a JSON envelope or streaming NDJSON with token usage and tool calls, accept a JSON schema, and take prompts on stdin; note the terms forbid third-party clients using Antigravity OAuth.“Headless mode (also called print mode) sends a single prompt to the agent, streams or returns the response, and exits.”Headless mode, second paragraph · checked 2026-09-10

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7. #6FA

   Factory

   Droid coding agents that run in the desktop app, CLI, IDEs, CI and Factory-managed cloud computers.

   Best forEngineering organizations that want AI agents handling more of the SDLC than code generation alone (triage, testing, release and documentation) and are willing to pay enterprise pricing for deployment flexibility and compliance controls.

   API access: Yes — Public REST API at api.factory.ai with bearer keys covers sessions, computers, org, service accounts, CI automations and wiki; TypeScript and Python SDKs exist.“Public API for Factory platform. Requires authentication via the `Authorization: Bearer` header.”Page subtitle · checked 2026-09-02

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8. #7LE

   Letta

   Stateful agent harness, cloud and SDK for agents with persistent, git-versioned memory.

   Best forDevelopers and researchers who specifically need an agent whose memory, skills and identity genuinely persist and evolve across long-running sessions, rather than reset on every call.

   API access: Yes — Cloud agents are drivable via the Letta REST API with an API key; the recommended path is the TypeScript Agent SDK.“Agents hosted in Letta Cloud are also accessible through the Letta REST API using a LETTA_API_KEY.”App Server section, "Is there a REST API?" · checked 2026-09-02

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9. #8CC

   Codex CLI

   OpenAI's terminal coding agent for inspecting, editing and running repository code from the shell.

   Best forDevelopers who already pay for a ChatGPT plan and want a terminal-native agent with granular, inspectable sandbox/permission controls across CLI, desktop and IDE surfaces.

   API access: Yes — TypeScript and Python SDKs plus an app-server protocol drive local Codex threads programmatically.“If you use Codex through Codex CLI, the IDE extension, or Codex cloud, you can also control it programmatically.”Codex SDK, opening paragraph · checked 2026-09-02

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10. #9OP

    OpenCode

    Open source AI coding agent for the terminal, desktop app and IDE, with 75+ model providers.

    Best forDevelopers who want a genuinely free, fully open-source coding agent that works with any model provider, including their own local Ollama models, without being locked into one vendor's terminal tool.

    API access: Yes — A headless HTTP server exposes sessions, messages and tools behind an OpenAPI 3.1 spec used to generate its own SDK.“The opencode serve command runs a headless HTTP server that exposes an OpenAPI endpoint that an opencode client can use.”Server page, opening paragraph · checked 2026-09-21

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11. #10ZO

    zot

    Single-binary terminal coding agent harness in Go, with 30+ model providers and any-language extensions.

    Best forDevelopers who want a fast, free, Go-native coding-agent harness with real session-branching control and are comfortable running fast-moving, self-described "beta forever" software from an independent maintainer.

    API access: Yes — A long-lived RPC child process exchanges newline-delimited JSON over stdin and stdout, and the vendor publishes a TypeScript SDK that wraps it for Node server runtimes.“It starts a long-lived `zot rpc` child process and talks newline-delimited JSON over stdin/stdout, so you get streaming output without hand-rolling the protocol.”Node.js SDK page, opening paragraph · checked 2026-09-28

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12. #11OP

    OpenHands

    Open-source software engineering agent with GUI, CLI, SDK and an enterprise control plane.

    Best forOpen source-minded engineering teams and enterprises that want a self-hostable coding agent platform

    Choose OpenHands if you want an open-source, self-hostable agent platform with an embeddable SDK, rather than a single vendor's closed API.

    API access: Yes — A documented REST API starts and polls conversations with a bearer key, and the pricing table ticks Cloud APIs on all three plans.“OpenHands Cloud provides a REST API that allows you to programmatically interact with OpenHands.”Cloud API Overview, opening paragraph · checked 2026-09-21

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13. #12CL

    Cline

    Open-source coding agent for VS Code, JetBrains, the terminal and CI, running on whichever model you bring.

    Best forDevelopers and teams who want a transparent, open-source, model-agnostic agent they fully control and pay for by usage, with optional flat-rate access to open-weight models.

    Cline is open-source and model-agnostic, and its API surface sits on top of code you can actually read. That makes it the pick when your work reaches into the agent's own implementation as well as its API.

    API access: Yes — Two documented APIs plus an SDK: an OpenAI-compatible chat completions endpoint for inference, a REST admin API for orgs and keys, and npm packages that embed the agent loop itself.“You authenticate once with a Cline API key and get access to models from Anthropic, OpenAI, Google, and more through a single base URL.”'What is the Cline API?' section · checked 2026-09-12

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14. #13DE

    Devin

    Cloud AI software engineer that takes a ticket, works in its own VM, and opens a pull request.

    Best forEngineering teams offloading well-scoped migration tasks without adding headcount

    Choose Devin if the job is handing off a whole ticket and getting a reviewed pull request back through its API, rather than driving an interactive session yourself.

    API access: Yes — REST API creates and drives sessions under an organization scope, with a separate enterprise scope for analytics and audit logs.“The Devin API enables you to integrate Devin into your applications, automate workflows, and build powerful tools.”API Overview, first paragraph · checked 2026-09-02

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15. #14CC

    Claude Code

    Agentic coding tool from Anthropic that edits your codebase, runs commands, and opens pull requests.

    Best forTerminal-native workflows that compose with CI

    Claude Code runs as an interactive chat window, but the reason to reach for it here is that the same agent is scriptable from a real command line and composes with CI. The strongest fit if the job is automation rather than clicking through a GUI.

    API access: Yes — The Agent SDK exposes the same agent loop as a Python or TypeScript library, and claude -p with JSON output drives it from any language.“the same tools, agent loop, and context management that power Claude Code, programmable in Python and TypeScript”Opening paragraph · checked 2026-09-02

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16. #15CU

    Cursor

    Coding agent in a desktop editor, terminal CLI, cloud VMs and CI, priced per seat plus token usage.

    Best forProfessional developers who want a powerful AI agent woven into a familiar VS Code-based editor, with first-class model choice and the option to be hands-off via Cursor Router.

    API access: Yes — Cloud Agents API is beta on all plans and the TypeScript/Python SDKs are for all users; Admin, Analytics, AI Code Tracking and Bugbot APIs are Enterprise-only, and the India-only Start plan excludes the SDK.“Cursor provides multiple APIs for programmatic access to your team's data, AI-powered coding agents, and analytics.”Cursor APIs Overview, opening paragraph and Availability column · checked 2026-09-02

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17. #16GC

    GitHub Copilot

    GitHub's AI coding assistant and cloud agent, from editor completions to pull-request review.

    Best forEnterprise and team developers already in GitHub and mainstream IDEs who want governed, reviewable AI coding at scale, with optional access to Claude Code and OpenAI Codex through the same interface.

    API access: Yes — Three routes: non-interactive CLI prompts on every plan, a Copilot SDK for embedding the agent, and an agent tasks REST API in public preview for starting cloud sessions.“This allows you to use Copilot programmatically in scripts, CI/CD pipelines, and automation workflows.”Introductory paragraph · checked 2026-09-02

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