# Farcaster On Chain API

**Canonical:** https://apis.io/apis/farcaster/farcaster-on-chain-api/  
**Provider:** Farcaster — https://apis.io/providers/farcaster/  
**Base URL:** https://snapchain.farcaster.xyz  
**Documentation:** https://snapchain.farcaster.xyz/

Farcaster On Chain API is one of 15 APIs that [Farcaster](https://apis.io/providers/farcaster/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Onchain. The published artifact set on APIs.io includes an OpenAPI specification.

The On Chain API from Farcaster — 4 operation(s) for on chain.

## Operations (4)

| Method | Path | Summary |
|---|---|---|
| GET | `/v1/onChainSignersByFid` | List on-chain signers for a FID |
| GET | `/v1/onChainEventsByFid` | List on-chain events for a FID |
| GET | `/v1/onChainIdRegistryEventByAddress` | Lookup the IdRegistry event for a wallet address |
| GET | `/v1/fidAddressType` | Get the address type for a FID |

## Machine-readable artifacts (1)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/farcaster/refs/heads/main/openapi/farcaster-on-chain-api-openapi.yml

## Other Farcaster APIs (12)

- [Snapchain / Hub API](https://apis.io/apis/farcaster/snapchain/)
- [Farcaster Mini Apps SDK](https://apis.io/apis/farcaster/mini-apps-sdk/)
- [Sign In with Farcaster (SIWF)](https://apis.io/apis/farcaster/siwf/)
- [Farcaster AuthKit (React)](https://apis.io/apis/farcaster/auth-kit/)
- [Neynar Hosted Farcaster API](https://apis.io/apis/farcaster/neynar/)
- [Warpcast / Farcaster Client API](https://apis.io/apis/farcaster/warpcast-api/)
- [Farcaster Casts API](https://apis.io/apis/farcaster/farcaster-casts-api/)
- [Farcaster Events API](https://apis.io/apis/farcaster/farcaster-events-api/)
- [Farcaster Info API](https://apis.io/apis/farcaster/farcaster-info-api/)
- [Farcaster Links API](https://apis.io/apis/farcaster/farcaster-links-api/)
- [Farcaster Reactions API](https://apis.io/apis/farcaster/farcaster-reactions-api/)
- [Farcaster Submit API](https://apis.io/apis/farcaster/farcaster-submit-api/)

## Tags

Onchain

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/farcaster/farcaster-on-chain-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/farcaster/.