connect-es (Connect for ECMAScript)

Connect for ECMAScript provides type-safe browser and Node.js clients and Node.js servers from Protobuf schemas. Targets the Connect protocol and gRPC-Web with idiomatic TypeScript types and tree-shakable output.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/connect-es"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
aid: connect-rpc:connect-es
name: connect-es (Connect for ECMAScript)
description: Connect for ECMAScript provides type-safe browser and Node.js clients and Node.js servers
  from Protobuf schemas. Targets the Connect protocol and gRPC-Web with idiomatic TypeScript types and
  tree-shakable output.
humanURL: https://connectrpc.com/docs/web/
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- JavaScript
- SDK
- TypeScript
properties:
- type: Documentation
  url: https://connectrpc.com/docs/web/
- type: GettingStarted
  url: https://connectrpc.com/docs/web/getting-started
- type: GitHub
  url: https://github.com/connectrpc/connect-es
x-features:
- Browser Clients
- Node.js Clients
- Node.js Servers
- Tree-Shakable Bundles
- Type-Safe TypeScript
- gRPC-Web Compatibility
x-use-cases:
- Call Protobuf services from React, Vue, or vanilla JS
- Build Node.js servers without a gRPC dependency
- Share TypeScript types between client and server