# Flow Everywhere: HTTP API on Mainnet **URL:** \ **Category:** Announcements\ **Created:** [February 24, 2022, 1:58pm UTC](https://forum.flow.com/t/flow-everywhere-http-api-on-mainnet/2866 "2022-02-24T13:58:46Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![srinjoy](https://avatars.discourse-cdn.com/v4/letter/s/d9b06d/32.png) [@srinjoy](https://forum.flow.com/u/srinjoy)\ **Post date:** [February 24, 2022, 1:58pm UTC](https://forum.flow.com/t/flow-everywhere-http-api-on-mainnet/2866/1 "2022-02-24T13:58:46Z")
> **The HTTP API on the Access Node has been released on both Testnet and Mainnet.** **This API will be offered in addition to the current GRPC endpoints so there will be no breaking changes or adjustments that are needed for your existing dapps.** With the HTTP API on mainnet, we increase access to Flow across all environments, offer better error handling, smaller payload sizes, and much more! _Try it out on testnet or mainnet:_ - You can check out the API documentation [here](https://docs.onflow.org/http-api/). _Try it locally:_ - Use the [Flow CLI](https://github.com/onflow/flow-cli/) version \>= [v0.31.0](https://github.com/onflow/flow-cli/releases/tag/v0.31.0) and start the emulator. Set your network configurations to point to the HTTP API that will be available on port `8888` by default. - Use any [Flow Emulator](https://github.com/onflow/flow-emulator/) version \>= [v0.28.0](https://github.com/onflow/flow-emulator/releases/tag/v0.28.0). _Use it with FCL (in alpha):_ - To use the HTTP API with FCL, you can download [0.0.79-alpha.3](https://www.npmjs.com/package/@onflow/fcl/v/0.0.79-alpha.3) and follow the [upgrade path and configuration (Changelog)](https://github.com/onflow/fcl-js/blob/master/packages/sdk/CHANGELOG.md#0057-alpha1----2022-01-21). All bug reports, comments, concerns, and requests are welcome! Please file them with `[HTTP-API]` in the title of the issue: - [HTTP API Issues](https://github.com/onflow/flow-go) - [FCL JS issue](https://github.com/onflow/fcl-js/issues)