Sei website screenshot

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
26.7/100 emerging ▬ flat Agent 32/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
10 APIs
BlockchainLayer 1EVMDeFiDEXTradingCosmosWeb3

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 26.7/100 · emerging
Contract Quality 11.8 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 6.8 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 32/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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
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.

Sei EVM JSON-RPC API

Ethereum-compatible JSON-RPC API for interacting with Sei's EVM layer. Supports standard Ethereum methods for sending transactions, querying account balances and code, retrievin...

Sei ABCI API

ABCI APIs

Sei Events API

Event subscription APIs

Sei Evidence API

Evidence APIs

Sei Info API

Informations about the node APIs

Sei Query API

The Query API from Sei — 129 operation(s) for query.

Sei Service API

The Service API from Sei — 10 operation(s) for service.

Sei Tx API

Transactions broadcast APIs

Sei Unsafe API

Unsafe APIs

Sei Websocket API

Subscribe/unsubscribe are reserved for websocket events.

Scroll for all 10

Rate Limits 2

Documented rate limits and quota policies.

Sei Cosmos Rest Api Rate Limits

5 limits

RATE LIMITS

Sei Evm Json Rpc Api Rate Limits

4 limits

RATE LIMITS

Semantic Vocabularies 1

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

Sei Context

0 classes · 0 properties

JSON-LD

Security Posture 1

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

Sei Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Sei Agentic Access

177 operations · 2 acting

177 operations · 2 acting

AGENTIC

Resources

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

X
X
 BlockExplorer
BlockExplorer
 Faucet
Faucet

Source (apis.yml)

apis.yml Raw ↑ 
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: '0.19'
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
  - 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:
  - 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
  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