Developer Portal
This page is the curated entry point for building on Flare and for AI agents that need API docs, authentication guidance, sandbox endpoints, and machine-readable specs.
Flare Developer Hub documents Flare Mainnet (chain ID 14) and Coston2 (chain ID 114), as well as Songbird (chain ID 19) and Coston (chain ID 16), where relevant.
Prefer Coston2 for dApp examples and use the ContractRegistry pattern instead of hardcoding protocol addresses.
Quickstarts
- Deploy your first contract — browser-based deploy on Flare.
- Hardhat or Foundry starter kits — local tooling and deploy workflows.
- FTSOv2 price feeds — onchain market data from the Flare Time Series Oracle.
- FDC attestations — verify external chain and Web2 data onchain.
- FAssets / FXRP — bring XRP, BTC, and similar assets into Flare DeFi.
- Smart Accounts — account abstraction for XRPL users on Flare.
API documentation
| Resource | URL | Purpose |
|---|---|---|
| DA Layer OpenAPI | /openapi/data-availability-api.yaml | Data Availability Client API (FTSO/FDC proofs) |
| Network overview | /network/overview | RPC endpoints, explorers, faucets, and API base URLs |
| Authentication | /developers#authentication | Optional API keys for higher DA/verifier rate limits |
Interactive Swagger for the Data Availability API is embedded in the FDC DA API reference and FTSO scaling DA API reference. Markdown mirrors of those pages expand the same OpenAPI spec into endpoint tables for agents.
Authentication
Public Flare HTTP APIs (Data Availability Layer and FDC verifiers) accept an optional API key via the X-API-Key header.
Without a key, endpoints remain usable at public rate limits.
With a key, rate limits increase.
Request a higher-limit DA Layer key by opening an API Key Request issue.
A public test verifier key (00000000-0000-0000-0000-000000000000) is documented on the network overview and in FAQs.
The Developer Hub itself is a static documentation site. Doc search and page fetch for agents use the MCP server, not a separate Hub REST API.
Sandbox environment
Use Coston2 as the primary developer sandbox:
| Item | Value |
|---|---|
| RPC | https://coston2-api.flare.network/ext/C/rpc |
| Chain ID | 114 |
| Explorer | coston2-explorer.flare.network |
| Faucet | faucet.flare.network/coston2 — C2FLR, FXRP, USDT0 |
| DA Layer | https://ctn2-data-availability.flare.network/ |
| FDC verifiers | https://fdc-verifiers-testnet.flare.network/ |
AI agents and MCP
- MCP (Streamable HTTP):
https://dev.flare.network/mcp— toolsdocs_searchanddocs_fetch; setup guide: Flare Developer Hub MCP Server. - Discovery:
/.well-known/mcp - llms.txt:
/llms.txt— when-to-use guidance and Markdown page index - Agent instructions:
/AGENTS.md - Markdown pages: append
.mdto any doc URL (for example/ftso/overview.md)
Developer tools catalog
Browse curated RPCs, bridges, indexers, wallet SDKs, and more on Developer Tools.