Source listed
BlockchainOnchain GraphQL APIs & DEX APIs
- Auth
- API Key
- HTTPS
- Yes
- CORS
- Yes
Blockchain APIs
Browse blockchain API resources and compare source-reported access requirements. Open the provider’s documentation to confirm current terms and capabilities.
18APIs
1Categories
9No Authentication
17HTTPS Supported
Browse all 52 categories
APILayer APIs17Animals24Anime20Anti-Malware17Art & Design31Authentication & Authorization7Blockchain18Books26Business47Calendar22Cloud Storage & File Sharing19Continuous Integration6Cryptocurrency96Currency Exchange27Data Validation16Development220Dictionaries15Documents & Productivity53Email38Entertainment19Environment30Events5Finance97Food & Drink36Games & Comics111Geocoding112Government126Health47Jobs37Machine Learning54Music36News26Open Data79Open Source Projects11Patent4Personality27Phone8Photography38Programming5Science & Math59Security61Shopping28Social58Sports & Fitness66Test Data37Text Analysis20Tracking11Transportation97URL Shorteners21Vehicle16Video58Weather47
18 matching APIs · Loading full catalog…
Source listed
BlockchainMultichain block explorer REST API (with Etherscan-compatible JSON-RPC)
- Auth
- API Key
- HTTPS
- Yes
- CORS
- No
Source listed
BlockchainBuild hybrid smart contracts with Chainlink
- Auth
- No Auth
- HTTPS
- Yes
- CORS
- Unknown
Source listed
BlockchainChainpoint is a global network for anchoring data to the Bitcoin blockchain
- Auth
- No Auth
- HTTPS
- Yes
- CORS
- Unknown
Source listed
BlockchainCross-frontend DEX attribution and execution quality data across Ethereum and L2s
- Auth
- No Auth
- HTTPS
- Yes
- CORS
- Yes
Source listed
BlockchainMulti-blockchain data aggregator platform
- Auth
- API Key
- HTTPS
- Yes
- CORS
- Unknown
Source listed
BlockchainRPC endpoints for 150+ blockchain networks, including Ethereum, Solana, Polkadot and Hyperliquid
- Auth
- API Key
- HTTPS
- Yes
- CORS
- Yes
Source listed
BlockchainEthereum explorer API
- Auth
- API Key
- HTTPS
- Yes
- CORS
- Yes
Source listed
BlockchainBilingual Web3 lessons, glossary search and role-based learning paths
- Auth
- No Auth
- HTTPS
- Yes
- CORS
- Yes
Source listed
BlockchainHelium is a global, distributed network of Hotspots that create public, long-range wireless coverage
- Auth
- No Auth
- HTTPS
- Yes
- CORS
- Unknown
Source listed
BlockchainGraphene social blockchain (Steem family) with a keyless condenser_api JSON-RPC
- Auth
- No Auth
- HTTPS
- Yes
- CORS
- Yes
Source listed
BlockchainBlockchain-as-a-service solution that provides high-quality connection via API
- Auth
- API Key
- HTTPS
- Yes
- CORS
- Unknown
Source listed
BlockchainBlockchain-based blogging and social media website
- Auth
- No Auth
- HTTPS
- No
- CORS
- No
Source listed
BlockchainMulti-chain blockchain RPC nodes (Ethereum, Solana and 75+ networks)
- Auth
- API Key
- HTTPS
- Yes
- CORS
- Yes
Source listed
BlockchainIndexing protocol for querying networks like Ethereum with GraphQL
- Auth
- API Key
- HTTPS
- Yes
- CORS
- Unknown
Source listed
BlockchainSolana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets
- Auth
- No Auth
- HTTPS
- Yes
- CORS
- Yes
Source listed
BlockchainTo retrieve Walltime's market info
- Auth
- No Auth
- HTTPS
- Yes
- CORS
- Unknown
Source listed
BlockchainProvide simple and reliable API access to Ethereum blockchain
- Auth
- API Key
- HTTPS
- Yes
- CORS
- Unknown
Choose an API with clear expectations
Use No Auth to find entries reported as not requiring credentials. It does not mean unlimited use. HTTPS describes source-reported transport support; it is different from the protocol of the documentation link. CORS concerns browser requests, so a service can work on a backend even when browser access is unavailable.
First confirm that the provider still documents your use case. Read its pricing, quotas, data license and privacy terms, then test with non-sensitive sample data in your own environment. Favorites are saved in this browser so you can compare candidates later.
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