Thanks for taking the time to contribute. The API / infra space ships fast — the list only stays useful with community help.
- Live APIs only (or beta, marked 🟡). Abandoned APIs get marked 🔴 or removed.
- One entry per row, alphabetical-ish within sub-groupings where possible.
- Match the column structure of the section you're editing.
- Use the legend:
- 🟢 Live · 🟡 Beta / Limited · 🔴 Inactive · ⚡ Top-tier · 🆕 Launched 2025/26 · 🎟️ Affiliate link · 🆓 Free / open-source
- Free tier or transparent pricing required. "Contact sales" with no public docs is rejected.
- No referral spam. One affiliate link per row max. Mark 🎟️ only if you've verified the link works.
- Multi-chain blockchain data APIs
- RPC providers (any chain)
- Chain-specific data APIs (Solana, EVM, Bitcoin/Lightning)
- Block explorer APIs
- Crypto market & price data APIs
- DEX / NFT / DeFi data APIs
- Smart-money / on-chain intelligence APIs
- Wallet & portfolio APIs
- Stablecoin data APIs
- Bridge / cross-chain data APIs
- MEV / mempool / block-builder APIs
- TX simulation & tracing APIs
- Streaming APIs (Kafka, gRPC, WebSocket)
- Historical / archive data APIs
- Subgraph & custom indexing tools
- Oracle APIs
- Embedded wallet / WaaS APIs
- Authentication, identity, social-login APIs
- MCPs for AI agents accessing blockchain data
- DePIN data networks
- CEX / exchange APIs (with developer documentation)
- SDKs & libraries (active, maintained)
- Free public APIs
- Marketing pages with no actual API
- Discontinued or unmaintained APIs
- Closed-beta APIs with no public access
- "Crypto AI" projects without an actual API
- Affiliate-link spam
- Duplicate entries (please grep the README first)
- Fork the repo
- Create a feature branch (
feature/add-foo-api) - Edit the relevant section
- Open a PR with:
- API name + URL
- One-line description
- Coverage / chain support
- Why it belongs in the section you placed it in
- Free tier vs paid (if known)
Found a broken link, dead project, or wrong free-tier limit? Open an issue or PR with a quick note.