Testnet
A resource tag, not a market
No company describes its business as “Testnet”. It names something an API does — and 24 providers reach it through a specification or operation tag. The APIs below are the answer to this tag; the companies are not.
Providers using this tag (0)
No company classifies itself here — see the resource-tag note above, and the APIs below.
APIs with this tag (30)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Strong 2 Solid coverage with minor gaps
Developing 3 Usable, with meaningful gaps to close
OP Sepolia JSON-RPCPublic Ethereum JSON-RPC endpoint for the OP Sepolia testnet (chain ID 11155420) used for development and i...zkSync Era Sepolia JSON-RPCJSON-RPC endpoint for the zkSync Era Sepolia testnet (chain ID 300) used for development, contract deployme...ThunderCore Testnet JSON-RPC APIEthereum-compatible JSON-RPC 2.0 API for the ThunderCore testnet (chain ID 18, TST gas token), with a fauce...
Thin 20 Limited public surface area
Arbitrum Sepolia JSON-RPCPublic Ethereum JSON-RPC endpoint for the Arbitrum Sepolia testnet (chain ID 421614).Monad Testnet JSON-RPCPublic JSON-RPC endpoint for the Monad public testnet, used for application development, integration testin...Flashbots Auction Relay (Sepolia Testnet)Sepolia testnet instance of the Flashbots Auction JSON-RPC relay for bundle submission and testing without ...SUAVESingle Unifying Auction for Value Expression - an Ethereum-native, MEV-aware, privacy-first encrypted mempo...Blast Sepolia Testnet JSON-RPCPublic JSON-RPC endpoint for the Blast Sepolia testnet (chain ID 168587773), used for application developme...Blastscan Sepolia Testnet ExplorerBlastscan instance for the Blast Sepolia testnet, supporting transaction lookup and contract verification f...Starknet Sepolia RPC (Public Providers)Public JSON-RPC endpoint for Starknet Sepolia testnet (chain ID SN_SEPOLIA) for development and integration...BandChain Testnet REST APIThe BandChain V3 Testnet REST API mirrors the mainnet REST API and provides a sandbox environment for devel...Kite Chain JSON-RPC (Testnet)EVM-compatible JSON-RPC interface for Kite Chain testnet (chain ID 2368), paired with a public faucet and t...Scroll JSON-RPC (Sepolia Testnet)Standard Ethereum JSON-RPC endpoint for Scroll Sepolia testnet (chain ID 534351), used for development, int...Scrollscan API (Sepolia)Etherscan-compatible REST API for the Scroll Sepolia testnet explorer, mirroring the mainnet Scrollscan API...Filecoin Calibration Testnet Glif APIGlif-hosted public Lotus node endpoint for the Filecoin Calibration testnet. Provides the same read-only JS...XRPL JSON-RPC API (Testnet)JSON-RPC interface to the XRP Ledger Altnet testnet for development and testing. Supports the same method s...XRPL WebSocket API (Testnet)WebSocket interface to the XRP Ledger Altnet testnet for development and testing. Supports real-time subscr...Mantle JSON-RPC (Sepolia Testnet)Standard Ethereum JSON-RPC endpoint for the Mantle Sepolia testnet, used for development, contract deployme...Wormholescan Testnet APITestnet version of the Wormholescan REST API for development and testing against Wormhole-supported test ne...Base Sepolia JSON-RPCPublic JSON-RPC endpoint for the Base Sepolia testnet (chain ID 84532) used for development, contract deplo...Push Chain Testnet FaucetPublic testnet faucet at faucet.push.org for the Push Chain Donut Testnet. Delivers 1 PC (native gas token)...Berachain Bepolia Testnet JSON-RPCPublic JSON-RPC endpoint for the Bepolia testnet (chain ID 80069), used for application development and int...Berascan Bepolia Testnet ExplorerBerascan instance for the Bepolia testnet, supporting transaction lookup and contract verification for test...
Emerging 5 Early or largely undocumented
Linea Sepolia Testnet JSON-RPCPublic JSON-RPC endpoint for the Linea Sepolia testnet (chain ID 59141), used for application development, ...Lineascan Sepolia Testnet ExplorerLineascan instance for the Linea Sepolia testnet, supporting transaction lookup and contract verification f...5ireChain Thunder Testnet JSON-RPCEthereum-compatible JSON-RPC 2.0 endpoint for the 5ireChain Thunder testnet (EIP-155 chain ID 997, native c...Ronin JSON-RPC (Saigon Testnet)JSON-RPC endpoint for the Saigon testnet (chain ID 2021), used for development, integration testing, and dA...Ancient8 Testnet JSON-RPC (Celestia)Public Ethereum JSON-RPC interface for the Ancient8 Celestia testnet (chain ID 28122024, currency ETH), ava...
Companies reaching this through an API (24)
These companies publish an API, specification or operation carrying “Testnet” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
5ire
Ancient8
Aptos
Arbitrum
Band Protocol
Base
Berachain
Blast
Chainstack
Filecoin
Flashbots
Kite
Linea
Mantle Network
Monad
Optimism
Push Protocol
Ronin Network
Scroll
Starknet
ThunderCore
Wormhole
XRP Ledger
zkSync
Score breakdown
Frequency
38.4
log-scaled weighted occurrences
Breadth
0.0
spread across providers
Quality lift
25.1
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor
Related tags
Mainnet 16 co-occurrences
Sepolia 10 co-occurrences
Bridge 11 co-occurrences
L1 6 co-occurrences
Layer 2 10 co-occurrences
OP Stack 5 co-occurrences
Blockscout 5 co-occurrences
Canonical 5 co-occurrences
Where this tag comes from
Api tag30
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.