Mysten Labs

Mysten Labs is the web3 infrastructure company that created Sui, a Layer 1 blockchain and smart-contract platform built on the Move programming language, and Walrus, a decentralized blob-storage network coordinated on Sui. Mysten Labs publishes the Sui developer platform: a JSON-RPC (OpenRPC) API, a GraphQL RPC API, and a gRPC (Protobuf) API for reading chain state, querying objects and events, and executing transactions, together with first-party TypeScript, Rust, and Move SDKs, the `sui` command-line interface, dApp Kit, and zkLogin/Enoki authentication tooling. The public full-node RPC endpoints are open (no API key), and the platform is fully open source under Apache 2.0.

Mysten Labs publishes 3 APIs on the APIs.io network. Tagged areas include Company, Blockchain, Web3, Sui, and Move.

The Mysten Labs catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Mysten Labs’ developer surface includes documentation, API reference, getting-started guide, engineering blog, authentication, changelog, CLI, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub

42.7/100 developing ▬ flat Agent 35/100 agent ready library Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessOpen

3 APIs 1 MCP Servers

Company Blockchain Web3 Sui Move JSON-RPC GraphQL gRPC SDK Smart Contracts Decentralized Storage Cryptocurrency

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 42.7/100 · developing

Contract Quality 10.4 / 25

Developer Ergonomics 15.7 / 20

Access Clarity 0.0 / 20

Operational Transparency 7.9 / 13

Contract Governance 0.5 / 12

Discoverability 8.2 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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 Well-Known Document 0 / 5

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.

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 github.com/api-evangelist/mysten-labs: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 3

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

Sui JSON-RPC API

The Sui full-node JSON-RPC API (OpenRPC 1.2.6) for reading objects, coins, balances, events, checkpoints, dynamic fields, and system state, and for dry-running/executing transac...

Sui GraphQL RPC API

The Sui GraphQL RPC API — a GraphQL interface over Sui network data (objects, transactions, events, checkpoints, coins, name service) served from indexed full-node data. Recomme...

Sui gRPC API

The Sui full-node gRPC API (Protobuf, sui.rpc.v2) exposing LedgerService, StateService, TransactionExecutionService, MovePackageService, SignatureVerificationService, and Subscr...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Mysten Labs MCP Server

The official Sui documentation MCP server (kapa.ai-powered) for up-to-date answers grounded in Sui docs. Referenced by the Mysten Labs agent-skills repo as the recommended MCP s...

MCP SERVER

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Mysten Labs Subscriptions

ASYNCAPI

Security Posture 3

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

Mysten Labs Authentication

none · 1 scheme

SECURITY

Mysten Labs Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Mysten Labs Vulnerability Disclosure

contact published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

WellKnown

MCPServer

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conformance

Lifecycle

Conventions

ErrorCatalog

DataModel

Webhooks

Components

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 4

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

Deprecation

Deprecation

ChangeLog

ChangeLog

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

APICatalog

APICatalog

Protobuf

Protobuf

Source (apis.yml)

aid: mysten-labs
name: Mysten Labs
description: 'Mysten Labs is the web3 infrastructure company that created Sui, a Layer 1 blockchain and smart-contract platform
  built on the Move programming language, and Walrus, a decentralized blob-storage network coordinated on Sui. Mysten Labs
  publishes the Sui developer platform: a JSON-RPC (OpenRPC) API, a GraphQL RPC API, and a gRPC (Protobuf) API for reading
  chain state, querying objects and events, and executing transactions, together with first-party TypeScript, Rust, and Move
  SDKs, the `sui` command-line interface, dApp Kit, and zkLogin/Enoki authentication tooling. The public full-node RPC endpoints
  are open (no API key), and the platform is fully open source under Apache 2.0.'
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  label: Open access
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/MystenLabs
url: https://raw.githubusercontent.com/api-evangelist/mysten-labs/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 21
  pass: local-v1
tags:
- Company
- Blockchain
- Web3
- Sui
- Move
- JSON-RPC
- GraphQL
- gRPC
- SDK
- Smart Contracts
- Decentralized Storage
- Cryptocurrency
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Sui JSON-RPC API
  description: The Sui full-node JSON-RPC API (OpenRPC 1.2.6) for reading objects, coins, balances, events, checkpoints, dynamic
    fields, and system state, and for dry-running/executing transaction blocks. 56 methods across the sui_, suix_, and unsafe_
    namespaces. Deprecated in favor of gRPC / GraphQL RPC (migration targeted July 2026).
  humanURL: https://docs.sui.io/references/sui-api
  baseURL: https://fullnode.mainnet.sui.io:443
  tags:
  - JSON-RPC
  - OpenRPC
  - Blockchain
  properties:
  - type: OpenRPC
    url: openrpc/mysten-labs-sui-jsonrpc-openrpc.json
  - type: Documentation
    url: https://docs.sui.io/references/sui-api
- name: Sui GraphQL RPC API
  description: The Sui GraphQL RPC API — a GraphQL interface over Sui network data (objects, transactions, events, checkpoints,
    coins, name service) served from indexed full-node data. Recommended replacement for JSON-RPC.
  humanURL: https://docs.sui.io/references/sui-graphql
  baseURL: https://graphql.mainnet.sui.io/graphql
  tags:
  - GraphQL
  - Blockchain
  properties:
  - type: Documentation
    url: https://docs.sui.io/references/sui-graphql
- name: Sui gRPC API
  description: The Sui full-node gRPC API (Protobuf, sui.rpc.v2) exposing LedgerService, StateService, TransactionExecutionService,
    MovePackageService, SignatureVerificationService, and SubscriptionService for high-throughput, typed access to chain data
    and transaction execution. Recommended replacement for JSON-RPC.
  humanURL: https://docs.sui.io/references/fullnode-protocol
  baseURL: https://fullnode.mainnet.sui.io:443
  tags:
  - gRPC
  - Protobuf
  - Blockchain
  properties:
  - type: Protobuf
    url: grpc/sui/rpc/v2/ledger_service.proto
  - type: Documentation
    url: https://docs.sui.io/references/fullnode-protocol
common:
- type: DeveloperPortal
  url: https://docs.sui.io
- type: Documentation
  url: https://docs.sui.io
- type: APIReference
  url: https://docs.sui.io/references/sui-api
- type: GettingStarted
  url: https://docs.sui.io/guides/developer/getting-started
- type: GitHubOrganization
  url: https://github.com/MystenLabs
- type: Blog
  url: https://blog.sui.io
- type: Website
  url: https://mystenlabs.com
- type: StatusPage
  url: https://status.sui.io
- type: LLMsTxt
  url: llms/mysten-labs-llms.txt
- type: WellKnown
  url: well-known/mysten-labs-well-known.yml
- type: APICatalog
  url: well-known/mysten-labs-api-catalog.json
- type: Packages
  url: packages/mysten-labs-packages.yml
- type: SDKs
  url: packages/mysten-labs-packages.yml
- type: MCPServer
  url: mcp/mysten-labs-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Protobuf
  url: grpc/sui/rpc/v2/ledger_service.proto
- type: Conformance
  url: conformance/mysten-labs-conformance.yml
- type: Authentication
  url: authentication/mysten-labs-authentication.yml
- type: Lifecycle
  url: lifecycle/mysten-labs-lifecycle.yml
- type: Deprecation
  url: lifecycle/mysten-labs-lifecycle.yml
- type: ChangeLog
  url: changelog/mysten-labs-changelog.yml
- type: CLI
  url: cli/mysten-labs-cli.yml
- type: Conventions
  url: conventions/mysten-labs-conventions.yml
- type: ErrorCatalog
  url: errors/mysten-labs-error-codes.yml
- type: DataModel
  url: data-model/mysten-labs-data-model.yml
- type: Webhooks
  url: asyncapi/mysten-labs-subscriptions.yml
- type: DomainSecurity
  url: security/mysten-labs-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/mysten-labs-vulnerability-disclosure.yml
- type: Security
  url: https://github.com/MystenLabs/sui/blob/main/SECURITY.md
- type: Sandbox
  url: sandbox/mysten-labs-sandbox.yml
- type: Components
  url: components/mysten-labs-components.yml

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