CAIPs: Chain Agnostic Improvement Proposals

Numbered specifications for things that need to work across every blockchain: chain identifiers, account formats, JSON-RPC behaviors, address resolution. Maintained by the Chain Agnostic Standards Alliance (CASA); mirrored here from github.com/ChainAgnostic/CAIPs (CC0). Click any number to read the full spec without leaving RPCScan.

Glossary → · Namespace coverage → · EIP-7930 →

Highlights: start here

CAIP-2

Blockchain identifier: eip155:1, solana:5eykt…, bip122:00000…

CAIP-10

Account identifier: chain id plus address

CAIP-104

Namespace registry: every chain kind

CAIP-350

Binary serialization: pairs with EIP-7930

Final (2)

CAIP-2Blockchain ID SpecificationStandardFinal CAIP-10Account ID SpecificationStandardFinal

Review (8)

CAIP-1CAIP Purpose and GuidelinesMetaReview CAIP-19Asset Type and Asset ID SpecificationStandardReview CAIP-25Wallet Create Session JSON-RPC MethodStandardReview CAIP-74CACAO - Chain Agnostic CApability ObjectStandardReview CAIP-104Namespace Reference Purpose and GuidelinesMetaReview CAIP-122Sign in With X (SIWx)StandardReview CAIP-168IPLD Timestamp ProofStandardReview CAIP-350Binary Serialization of Blockchain IDs and AddressesStandardReview

Draft (33)

CAIP-6Blockchain Reference for the LIP9 NamespaceStandardDraft CAIP-7Blockchain Reference for the EOSIO NamespaceStandardDraft CAIP-20Asset Reference for the SLIP44 Asset NamespaceStandardDraft CAIP-27Wallet Invoke Method JSON-RPC MethodStandardDraft CAIP-29Asset Reference for the ERC1155 Asset NamespaceStandardDraft CAIP-50Multi-Chain Account ID SpecificationStandardDraft CAIP-154Restrict Web3 Provider API InjectionStandardDraft CAIP-169Simple Credential Interface ProviderStandardDraft CAIP-171Session IdentifiersStandardDraft CAIP-196CACAO - Chain Agnostic CApability ObjectStandardDraft CAIP-200BlockExplorer API RoutesStandardDraft CAIP-211JSON-RPC Authority NegotiationInformationalDraft CAIP-217Authorization ScopesStandardDraft CAIP-222Wallet Authenticate JSON-RPC MethodStandardDraft CAIP-261Web of Trust PrimitivesStandardDraft CAIP-275Domain Wallet AuthenticationStandardDraft CAIP-282Browser Wallet Discovery InterfaceStandardDraft CAIP-285JSON-RPC Method for Revoking Session AuthorizationsStandardDraft CAIP-288Best Practices for using CAIP 2 - Blockchain ID SpecificationInformationalDraft CAIP-294Browser Wallet Messaging for ExtensionsStandardDraft CAIP-295Browser Wallet Messaging for IframesStandardDraft CAIP-311JSON-RPC Event for Session Authorization UpdatesStandardDraft CAIP-312JSON-RPC Method for Retrieving Session AuthorizationsStandardDraft CAIP-316JSON-RPC Provider Session Lifecycle Management with CAIP-25 Sessions BCPInformationalDraft CAIP-319Wallet Notification JSON-RPC MethodStandardDraft CAIP-341Extension ID Target Type SpecificationStandardDraft CAIP-345Wallet Service URL propertyStandardDraft CAIP-358Universal Payment Request MethodStandardDraft CAIP-363Chain ID WildcardStandardDraft CAIP-373EVM Smart Contract Call Reference SpecificationStandardDraft CAIP-375Wallet Sign MessageStandardDraft CAIP-380Portable ProofStandardDraft CAIP-390Minimal Cross-Chain Asset Metadata StandardStandardDraft

Superseded (11)

About this mirror

Every CAIP is stored and served from RPCScan's own mirror, synced daily from the upstream CC0 repository at github.com/ChainAgnostic/CAIPs. Spotted a missing CAIP or an outdated status? Open an issue upstream.