Sei

Sei is a blockchain infrastructure platform focused on high-performance, low-latency trading and decentralized finance. It provides a scalable, secure layer‑1 solution optimized for financial markets, enabling institutions, funds, and developers to build fast, reliable on‑chain applications. The network emphasizes speed, reliability, and scalability for modern digital asset markets, supporting stablecoins, payments, and DeFi use cases.

Sei is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Blockchain, Infrastructure, Finance, and DeFi.

The Sei catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Sei’s developer surface includes CLI, changelog, getting-started guide, documentation, engineering blog, and 16 more developer resources.

🌐 Visit website📡 Profile data on GitHub
26.5/100 thin Agent 24/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →
2 APIs
CompanyBlockchainInfrastructureFinanceDeFi

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0
Composite quality — 26.5/100 · thin
Contract Quality 4.8 / 21
Developer Ergonomics 6.5 / 17
Access Clarity 1.8 / 17
Operational Transparency 2.3 / 11
Contract Governance 2.2 / 10
Discoverability 4.9 / 9
Regulatory Posture 2.2 / 15
Agent readiness — 24/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 8 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Pagination 5 / 5
Distinct Operations 0 / 3
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Show this score on your site. Kin Score badge preview for Sei It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/seinetwork-io/"><img src="https://apis.io/badge/seinetwork-io/card.svg" alt="Sei on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
Agent readiness — checks not met, largest first (exact, from this profile):
  • MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
  • Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
  • Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
10 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/seinetwork-io/apis.yml: open an issue on github.com/api-evangelist/seinetwork-io to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Sei Docs API

Documentation for Sei blockchain platform, covering EVM, nodes, tools, and ecosystem.

Sei API

Sei API as documented publicly: 19 operations. Contract generated from the documentation by API Evangelist (2026-10-26); not the provider's own document.

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Seinetwork Io Context

6 classes · 11 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Sei API Rules

8 rules · 6 errors 1 warnings 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

GetWeatherResponse

2 properties

JSON SCHEMA

PostRequest

4 properties

JSON SCHEMA

PostV1WalletsRequest

2 properties

JSON SCHEMA

PostV1WalletsResponse

4 properties

JSON SCHEMA

PostV1WalletsWalletAbc123RpcRequest

3 properties

JSON SCHEMA

PostV1WalletsWalletAbc123RpcResponse

1 properties

JSON SCHEMA

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Seinetwork Io Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 WellKnown
WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 DataModel
DataModel
 Conformance
Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

CLI
CLI
 SDKs
SDKs
 Packages
Packages
 GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

ChangeLog
ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 3

Properties that don't map to a standard resource type

AgentCard
AgentCard
 Hosts
Hosts
 Vendors
Vendors

Source (apis.yml)

apis.yml Raw ↑ 
aid: seinetwork-io
name: Sei
image: https://www.sei.io/opengraph-image.jpg?opengraph-image.17v0n-mv.owi8.jpg?dpl=dpl_6xFxckgTSd6RGPLsgLfmr7f48qKn
description: Sei is a blockchain infrastructure platform focused on high-performance, low-latency trading and decentralized
  finance. It provides a scalable, secure layer‑1 solution optimized for financial markets, enabling institutions, funds,
  and developers to build fast, reliable on‑chain applications. The network emphasizes speed, reliability, and scalability
  for modern digital asset markets, supporting stablecoins, payments, and DeFi use cases.
url: https://raw.githubusercontent.com/api-evangelist/seinetwork-io/refs/heads/main/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-26 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-25'
modified: '2026-10-25'
tags:
- Company
- Blockchain
- Infrastructure
- Finance
- DeFi
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/seinetwork-io-rules.yml
- type: JSONLD
  url: json-ld/seinetwork-io-context.jsonld
- type: Vocabulary
  url: vocabulary/seinetwork-io-vocabulary.yml
- type: DataModel
  url: data-model/seinetwork-io-data-model.yml
- type: CLI
  url: cli/seinetwork-io-cli.yml
- type: ChangeLog
  url: changelog/seinetwork-io-changelog.yml
- type: Conformance
  url: conformance/seinetwork-io-conformance.yml
- type: LLMsTxt
  url: llms/seinetwork-io-llms.txt
- type: AgentCard
  url: a2a/seinetwork-io-a2a.yml
- type: WellKnown
  url: well-known/seinetwork-io-well-known.yml
- type: Hosts
  url: hosts/seinetwork-io-hosts.yml
- type: Vendors
  url: vendors/seinetwork-io-vendors.yml
- type: SDKs
  url: packages/seinetwork-io-packages.yml
- type: Packages
  url: packages/seinetwork-io-packages.yml
- type: GettingStarted
  url: https://docs.sei.io/learn/user-quickstart
- type: DomainSecurity
  url: security/seinetwork-io-domain-security.yml
- type: Website
  url: https://seinetwork.io
- type: Documentation
  url: https://docs.sei.io/
- type: Blog
  url: https://blog.sei.io/
- type: GitHubOrganization
  url: https://github.com/sei-protocol
- type: TermsOfService
  url: https://dashboard.sei.io/terms
apis:
- name: Sei Docs API
  description: Documentation for Sei blockchain platform, covering EVM, nodes, tools, and ecosystem.
  humanURL: https://docs.sei.io/
  baseURL: null
  aid: seinetwork-io:sei-docs-api
- aid: seinetwork-io:seinetwork-io-api
  name: Sei API
  description: 'Sei API as documented publicly: 19 operations. Contract generated from the documentation by API Evangelist
    (2026-10-26); not the

    provider''s own document.'
  humanURL: https://docs.sei.io/ai/cambrian-agent-kit
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/seinetwork-io-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/seinetwork-io-post-v1-wallets-wallet-abc123-rpc-request-schema.json
  - type: JSONSchema
    url: json-schema/seinetwork-io-post-v1-wallets-response-schema.json
  - type: JSONSchema
    url: json-schema/seinetwork-io-get-weather-response-schema.json
  - type: JSONSchema
    url: json-schema/seinetwork-io-post-request-schema.json
  - type: JSONSchema
    url: json-schema/seinetwork-io-post-v1-wallets-request-schema.json
  - type: JSONSchema
    url: json-schema/seinetwork-io-post-v1-wallets-wallet-abc123-rpc-response-schema.json
x-backed-by:
- multicoin-capital
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Docs site renders content via JavaScript, no machine‑readable OpenAPI spec found.
  evidence:
  - url: https://docs.sei.io/openapi.json
    status: 404
  - url: https://docs.sei.io/openapi.yaml
    status: 404
  checked: '2026-10-26'
x-enrichment:
  date: '2026-10-26'
  status: enriched
  artifacts_added: 26
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Sei API — frequently asked questions

Does Sei have an API?

Yes. APIs.io lists 2 APIs from Sei, including Sei Docs API and Sei API.

Is there an OpenAPI specification for the Sei API?

Yes. APIs.io indexes 1 OpenAPI specification for Sei, each linked for download from this page.

Is the Sei API ready for AI agents?

Sei has a Kin Score of 26.5 out of 100 (thin) and an Agent Readiness score of 23.6 (agent-aware), scored by API Evangelist on 2026-10-31.

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