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 is listed with 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 engineering blog, documentation, API reference, getting-started guide, authentication, changelog, CLI, and 29 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

45.9/100 developing ▬ flat Agent 49/100 agent ready Front door AI 4/6 moderate Heartbeat 100/100 alive library Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessOpen

3 APIs 1 MCP Servers 1 Agent Skills

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

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 45.9/100 · developing

Contract Quality 8.3 / 21

Developer Ergonomics 13.4 / 17

Access Clarity 1.8 / 17

Operational Transparency 6.7 / 11

Contract Governance 0.5 / 10

Discoverability 6.9 / 9

Regulatory Posture 4.0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

3 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 10.5 — up to +17.9 composite points
Contract Quality scores 39.0 — up to +15.3 composite points
Contract Governance scores 4.5 — up to +11.5 composite points

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/mysten-labs/apis.yml: open an issue on github.com/api-evangelist/mysten-labs 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Agent Skills (SKILL.md packages)	mixed	44.1	-	1
IDE Extension Marketplaces (JetBrains, VS Code, Open VSX, Docker Verified Publishers, PyPI orgs)	mixed	44.1	-	1
Buf Schema Registry (public Protocol Buffers modules, gRPC / ConnectRPC schema publishers)	mixed	44.1	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 7

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

GraphQL

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

gRPC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

JSON RPC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

Agent Skills

measured — observed by APIs.io (published)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

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

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

accessing-data

AGENT SKILL

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Mysten Labs

SLA

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 5

SDKs, sample code, and the tooling you integrate with

IntegrationEdges

IntegrationEdges

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

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 4

The organization behind the API

Newsroom

Blog

Blog

Website

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

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
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: medium
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-11-06'
  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: '2026-10-06'
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
x-docs-hosting: vercel
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
common:
- type: Hosts
  url: hosts/mysten-labs-hosts.yml
- type: IntegrationEdges
  url: integrations/mysten-labs-integration-edges.yml
- type: Vendors
  url: vendors/mysten-labs-vendors.yml
- type: PrivacyPolicy
  url: https://www.mystenlabs.com/privacy-policy
- type: Newsroom
  url: https://www.mystenlabs.com/news
- url: https://www.mystenlabs.com/blog
  type: Blog
- 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: 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
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
  aid: mysten-labs:sui-json-rpc-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
  aid: mysten-labs:sui-graphql-rpc-api
- 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
  aid: mysten-labs:sui-grpc-api

Mysten Labs API — frequently asked questions

Does Mysten Labs have an API?

Yes. APIs.io lists 3 APIs from Mysten Labs, including Sui JSON-RPC API, Sui GraphQL RPC API and Sui gRPC API.

How do I authenticate with the Mysten Labs API?

Mysten Labs documents its authentication (none · 1 scheme). The details are profiled on APIs.io as Mysten Labs Authentication.

Does Mysten Labs have an MCP server?

Yes. APIs.io lists 1 MCP server for Mysten Labs: 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 server to query for Sui

Is the Mysten Labs API ready for AI agents?

Mysten Labs has a Kin Score of 45.9 out of 100 (developing) and an Agent Readiness score of 48.6 (agent-ready), scored by API Evangelist on 2026-11-06.

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