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

42.9/100 developing ▬ flat Agent 49/100 agent ready Front door AI 4/6 moderate library Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

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 2026-09-25 · rubric v0.23.0

Composite quality — 42.9/100 · developing

Contract Quality 8.3 / 21

Developer Ergonomics 13.4 / 17

Access Clarity 0.0 / 17

Operational Transparency 6.7 / 11

Contract Governance 0.5 / 10

Discoverability 6.8 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 49/100 · 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

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/.

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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