generated: '2026-07-19'
method: derived
source: openapi/ + docs.sequence.xyz
standards:
  - id: openapi-3.0
    conforms: true
    evidence: seven OpenAPI 3.0.0 documents published at docs.sequence.xyz/api-references
  - id: webrpc
    conforms: true
    evidence: all services are webrpc-generated JSON-RPC-over-HTTP (POST /rpc/Service/Method)
  - id: rfc9457-problem-details
    conforms: false
    evidence: errors use the webrpc envelope {error, code, msg, cause, status}, not application/problem+json
  - id: oauth2
    conforms: false
    evidence: no oauth2 securityScheme; auth is X-Access-Key (apiKey) + HTTP Bearer JWT
  - id: api-key-auth
    conforms: true
    evidence: X-Access-Key project access key header (ApiKeyAuth securityScheme) across all services
  - id: eip-1271-signature-validation
    conforms: true
    evidence: infrastructure API IsValidSignature / IsValidTypedDataSignature implement smart-contract signature checks
  - id: erc-721-erc-1155-metadata
    conforms: true
    evidence: metadata API serves ERC-721/ERC-1155 token and contract metadata
  - id: evm-json-rpc
    conforms: true
    evidence: Node Gateway proxies standard EVM JSON-RPC across 40+ chains