The AI-first API client

Design, send, test and share APIs of every protocol, with an MCP server for your AI tools and bring-your-own-key AI in the app. Works offline. Free.

Create a free account Open the app Read the docs

No credit card. Install it as an app from your browser's menu. Testing localhost or a private network? Download the Fetch Agent.

HTTP/1.1 · 2 · 3
GraphQL
WebSocket
Socket.IO
SSE
gRPC
MQTT 3.1.1 / 5
SOAP
MCP
LLM
SQL

AI-first

Bring your own key for Anthropic, OpenAI, OpenRouter or any OpenAI-compatible model. The assistant works through the same commands as the API, shows a diff and asks before every change.

An MCP server built in

Connect Claude, ChatGPT, Cursor or VS Code to https://fetch.nightroll.app/mcp and let your agent search, edit, run and test your collections. Publish any collection as its own MCP server.

Every protocol

HTTP with every body type, GraphQL, WebSocket, Socket.IO, SSE, gRPC, MQTT, SOAP, MCP, LLM requests and database queries through the agent.

Local first

Your workspace lives in your browser (SQLite on OPFS). Keep working offline, then press Sync to share your changes and get your team's.

Collaboration

Comments, forks and change requests, version history from the change log, roles for orgs and workspaces.

Postman compatible

Import Postman, Insomnia, Bruno, Hoppscotch, Thunder Client, OpenAPI, HAR and cURL. pm.* scripts run unchanged on QuickJS, with chai, lodash, moment and friends.

Test and monitor

No-code assertions and scripts, collection runs with CSV/JSON data, CI reports, monitors with Slack, Discord, Teams and PagerDuty alerts.

Three ways to send

From the browser for CORS-friendly APIs, through the Fetch Agent (a small download for macOS, Linux and Windows) for localhost and private networks, or from the cloud executor.

Secrets stay secret

Secret variables are encrypted at rest; vault variables never leave your device; external resolvers for 1Password, Vault, AWS, Azure, GCP and Bitwarden.

Connect your AI tools

Add Fetch as a remote MCP server in any MCP client. Sign-in happens in the browser (OAuth 2.1).

https://fetch.nightroll.app/mcp

Or run it locally over stdio: fetch mcp. See MCP setup for Claude, ChatGPT, Cursor and VS Code.

Free

Every feature is free, with fair-use caps per organization: 10,000 cloud requests and 100,000 hosted mock/MCP calls a month and 1 GB of storage. Sending from your browser or the Fetch Agent doesn't count against the cloud cap. All limits.