Sei

Sei is a high-performance Layer 1 blockchain optimized for trading and decentralized exchange (DEX) applications. It is the first parallelized EVM blockchain, delivering sub-second block times (~400ms), 100 MGas/s throughput, and full Ethereum compatibility without code changes. Sei combines Twin Turbo Consensus, a parallelization engine, and SeiDB to eliminate traditional performance bottlenecks. Developers can interact with Sei through EVM JSON-RPC endpoints (Ethereum-compatible) and Cosmos REST/LCD endpoints for querying markets, orders, accounts, staking, governance, and DEX state on the pacific-1 mainnet and atlantic-2 testnet networks.

Sei publishes 9 APIs on the APIs.io network, including ABCI API, Events API, Evidence API, and 6 more. Tagged areas include Blockchain, Layer 1, EVM, DeFi, and DEX.

The Sei catalog on APIs.io includes 1 JSON-LD context.

Sei’s developer surface includes documentation, GitHub presence, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

25.1/100 emerging ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

10 APIs

Blockchain Layer 1 EVM DeFi DEX Trading Cosmos Web3

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 25.1/100 · emerging

Contract Quality 9.4 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 0.0 / 17

Operational Transparency 4.9 / 11

Contract Governance 0.0 / 10

Discoverability 6.3 / 9

Regulatory Posture 2.7 / 15

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 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 Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data regime (on an ambiguous tag, where no other regime matched), 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.

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/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/sei: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 10

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

Open Collections 10

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Rate Limits 2

Documented rate limits and quota policies.

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

GitHub

GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Discord

Discord

StatusPage

StatusPage

Commercial 1

Pricing, plans, and the legal terms of use

FinOps

FinOps

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

BlockExplorer

BlockExplorer

Faucet

Faucet

Source (apis.yml)

aid: sei
name: Sei
description: Sei is a high-performance Layer 1 blockchain optimized for trading and decentralized exchange (DEX) applications.
  It is the first parallelized EVM blockchain, delivering sub-second block times (~400ms), 100 MGas/s throughput, and full
  Ethereum compatibility without code changes. Sei combines Twin Turbo Consensus, a parallelization engine, and SeiDB to eliminate
  traditional performance bottlenecks. Developers can interact with Sei through EVM JSON-RPC endpoints (Ethereum-compatible)
  and Cosmos REST/LCD endpoints for querying markets, orders, accounts, staking, governance, and DEX state on the pacific-1
  mainnet and atlantic-2 testnet networks.
type: Index
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sei.png
tags:
- Blockchain
- Layer 1
- EVM
- DeFi
- DEX
- Trading
- Cosmos
- Web3
url: https://raw.githubusercontent.com/api-evangelist/sei/refs/heads/main/apis.yml
specificationVersion: '0.23'
created: '2026-06-13'
modified: '2026-06-13'
apis:
- aid: sei:sei-evm-json-rpc-api
  name: Sei EVM JSON-RPC API
  description: Ethereum-compatible JSON-RPC API for interacting with Sei's EVM layer. Supports standard Ethereum methods for
    sending transactions, querying account balances and code, retrieving block and transaction data, managing log filters,
    estimating gas, and tracing transaction execution. Also includes Sei-specific extensions for cross-VM address resolution
    and synthetic transaction lookups. The public mainnet endpoint is rate-limited to 15 requests per second; dedicated endpoints
    are available through infrastructure providers for production workloads.
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - EVM
  - JSON-RPC
  - Ethereum
  - Blockchain
  - Transaction
  - Smart Contracts
  tags_raw:
  - EVM
  - JSON-RPC
  - Ethereum
  - Blockchain
  - Transactions
  - Smart Contracts
  properties:
  - type: Documentation
    url: https://docs.sei.io/evm/reference
  - type: GettingStarted
    url: https://docs.sei.io
  - type: RateLimits
    url: rate-limits/sei-evm-json-rpc-api-rate-limits.yml
  - type: JSONLD
    url: json-ld/sei.jsonld
  - type: Vocabulary
    url: vocabulary/sei-vocabulary.yml
  contact:
  - type: GitHub
    url: https://github.com/sei-protocol/sei-chain
  - type: Discord
    url: https://discord.gg/sei
- aid: sei:sei-abci-api
  name: Sei ABCI API
  description: ABCI APIs
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - ABCI
  properties:
  - type: OpenAPI
    url: openapi/sei-abci-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
- aid: sei:sei-events-api
  name: Sei Events API
  description: Event subscription APIs
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/sei-events-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
- aid: sei:sei-evidence-api
  name: Sei Evidence API
  description: Evidence APIs
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - Evidence
  properties:
  - type: OpenAPI
    url: openapi/sei-evidence-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
- aid: sei:sei-info-api
  name: Sei Info API
  description: Informations about the node APIs
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - Info
  properties:
  - type: OpenAPI
    url: openapi/sei-info-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
- aid: sei:sei-query-api
  name: Sei Query API
  description: The Query API from Sei — 129 operation(s) for query.
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - Query
  properties:
  - type: OpenAPI
    url: openapi/sei-query-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
- aid: sei:sei-service-api
  name: Sei Service API
  description: The Service API from Sei — 10 operation(s) for service.
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - Service
  properties:
  - type: OpenAPI
    url: openapi/sei-service-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
- aid: sei:sei-tx-api
  name: Sei Tx API
  description: Transactions broadcast APIs
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - Tx
  properties:
  - type: OpenAPI
    url: openapi/sei-tx-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
- aid: sei:sei-unsafe-api
  name: Sei Unsafe API
  description: Unsafe APIs
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - Unsafe
  properties:
  - type: OpenAPI
    url: openapi/sei-unsafe-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
- aid: sei:sei-websocket-api
  name: Sei Websocket API
  description: Subscribe/unsubscribe are reserved for websocket events.
  humanURL: https://docs.sei.io/evm/reference
  baseURL: https://evm-rpc.sei-apis.com
  tags:
  - WebSocket
  tags_raw:
  - Websocket
  properties:
  - type: OpenAPI
    url: openapi/sei-websocket-api-openapi.yml
  - type: Documentation
    url: https://docs.sei.io/cosmos-sdk/api
  - type: RateLimits
    url: rate-limits/sei-cosmos-rest-api-rate-limits.yml
common:
- type: AgenticAccess
  url: agentic-access/sei-agentic-access.yml
- type: DomainSecurity
  url: security/sei-domain-security.yml
- type: Website
  url: https://sei.io
- type: Documentation
  url: https://docs.sei.io
- type: GitHub
  url: https://github.com/sei-protocol
- type: GitHub
  url: https://github.com/sei-protocol/sei-chain
- type: Discord
  url: https://discord.gg/sei
- type: Blog
  url: https://blog.sei.io
- type: X
  url: https://x.com/SeiNetwork
- type: BlockExplorer
  url: https://www.seiscan.app
- type: Faucet
  url: https://docs.sei.io/getting-started/faucet
- type: StatusPage
  url: https://status.sei.io
- type: FinOps
  url: finops/sei-finops.md
maintainers:
- FN: API Evangelist
  url: https://apievangelist.com
  email: kin@apievangelist.com

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