Spacemesh

Spacemesh is a permissionless, self-mining proof-of-space-time (PoST) layer-1 blockchain built to run on ordinary home computers using unused disk space rather than specialized hardware or large capital stake. Its full-node software (go-spacemesh) exposes a gRPC API with a grpc-gateway REST/JSON facade for reading chain state — accounts, transactions, layers, rewards and activations (ATXs) — and for submitting transactions. Surfaced as a Paradigm portfolio company; the protocol, node, API design and developer tooling remain open source under the spacemeshos GitHub org, though the company's spacemesh.io / spacemesh.network web and hosted-API domains are now parked and the last node release was April 2025 (project appears dormant).

Spacemesh publishes 8 API contracts indexed on the APIs.io network, including AccountService API, ActivationService API, LayerService API, and 5 more. Tagged areas include Company, Crypto Infrastructure, Blockchain, Cryptocurrency, and Proof of Space-Time.

The Spacemesh catalog on APIs.io includes 1 Spectral governance ruleset.

Spacemesh’s developer surface includes documentation, API reference, CLI, changelog, and 23 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

36.3/100 thin ▬ flat Agent 16/100 agent aware Heartbeat 0/100 dormant self hosted · MIT Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

2 published contracts 2 Agent Skills

Company Crypto Infrastructure Blockchain CryptocurrencyProof of Space-TimeLayer 1 gRPCNode APIOpen Source

Kin Score

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

Composite quality — 36.3/100 · thin

Contract Quality 7.1 / 16

Developer Ergonomics 4.3 / 13

Access Clarity 0.0 / 13

Operational Transparency 2.4 / 8

Contract Governance 1.4 / 8

Discoverability 4.8 / 7

Regulatory Posture 1.6 / 15

Open Source Surface 10.0 / 10

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 16/100 · 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 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 0 / 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.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 65 points between them, because both conditional facets apply and carry 35 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 65% 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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

10 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points
Contract Quality scores 43.5 — up to +14.1 composite points
Developer Ergonomics scores 32.7 — up to +13.5 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/spacemesh/apis.yml: open an issue on github.com/api-evangelist/spacemesh 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
Buf Schema Registry (public Protocol Buffers modules, gRPC / ConnectRPC schema publishers)	distribution	19.2 (thin)	-	-

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 2

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.

gRPC

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

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

Spacemesh AccountService API

The AccountService API from Spacemesh — 2 operation(s) for accountservice.

Spacemesh ActivationService API

The ActivationService API from Spacemesh — 6 operation(s) for activationservice.

Spacemesh LayerService API

The LayerService API from Spacemesh — 2 operation(s) for layerservice.

Spacemesh MalfeasanceService API

The MalfeasanceService API from Spacemesh — 2 operation(s) for malfeasanceservice.

Spacemesh NetworkService API

The NetworkService API from Spacemesh — 2 operation(s) for networkservice.

Spacemesh NodeService API

The NodeService API from Spacemesh — 2 operation(s) for nodeservice.

Spacemesh RewardService API

The RewardService API from Spacemesh — 2 operation(s) for rewardservice.

Spacemesh TransactionService API

The TransactionService API from Spacemesh — 8 operation(s) for transactionservice.

Scroll for all 8

Open Collections 8

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

Spacemesh AccountService API

OPEN COLLECTION

Spacemesh AccountService ActivationService API

OPEN COLLECTION

Spacemesh AccountService LayerService API

OPEN COLLECTION

Spacemesh AccountService MalfeasanceService API

OPEN COLLECTION

Spacemesh AccountService NetworkService API

OPEN COLLECTION

Spacemesh AccountService NodeService API

OPEN COLLECTION

Spacemesh AccountService RewardService API

OPEN COLLECTION

Spacemesh AccountService TransactionService API

OPEN COLLECTION

Scroll for all 8

Agent Skills 2

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

Read Spacemesh chain state

AGENT SKILL

Submit a Spacemesh transaction

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Spacemesh API Rules

56 rules · 53 errors 2 warnings 1 info

SPECTRAL

OpenAPI Overlays 2

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Spacemesh V1 Overlay

2 actions · update · spacemesh-v1-openapi-original.json

DERIVED

Spacemesh V2Beta1 Overlay

2 actions · update · spacemesh-v2beta1-openapi-original.json

DERIVED

Security Posture 1

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

Spacemesh Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Spacemesh Agentic Access

26 operations · 9 acting

AGENTIC

Resources

Documentation 3

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgentSkill

LLMsTxt

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Conformance

Lifecycle

DataModel

Build 6

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

GitHubOrganization

SourceCode

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

SecurityPolicy

SecurityPolicy

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

Releases

Releases

ChangeLog

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Overlay

Overlay

Protobuf

Protobuf

Source (apis.yml)

aid: spacemesh
name: Spacemesh
description: Spacemesh is a permissionless, self-mining proof-of-space-time (PoST) layer-1 blockchain built to run on ordinary
  home computers using unused disk space rather than specialized hardware or large capital stake. Its full-node software (go-spacemesh)
  exposes a gRPC API with a grpc-gateway REST/JSON facade for reading chain state — accounts, transactions, layers, rewards
  and activations (ATXs) — and for submitting transactions. Surfaced as a Paradigm portfolio company; the protocol, node,
  API design and developer tooling remain open source under the spacemeshos GitHub org, though the company's spacemesh.io
  / spacemesh.network web and hosted-API domains are now parked and the last node release was April 2025 (project appears
  dormant).
url: https://raw.githubusercontent.com/api-evangelist/spacemesh/refs/heads/main/apis.yml
deliveryModel:
  model: self-hosted
  license: MIT
  open_source: true
  commercial: false
  callable_host: true
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://github.com/spacemeshos.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- paradigm
x-tier: enriched
x-tier-reason: gRPC + grpc-gateway node API captured from official GitHub org
x-project-status: dormant (web/API domains parked; last node release 2025-04-15)
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Crypto Infrastructure
- Blockchain
- Cryptocurrency
- Proof of Space-Time
- Layer 1
- gRPC
- Node API
- Open Source
tags_raw:
- Company
- Crypto Infrastructure
- Blockchain
- Cryptocurrency
- Proof of Space-Time
- Layer 1
- gRPC
- Node API
- Open Source
- Open-Source
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: spacemesh:spacemesh-accountservice-api
  name: Spacemesh AccountService API
  description: The AccountService API from Spacemesh — 2 operation(s) for accountservice.
  humanURL: https://github.com/spacemeshos/api
  baseURL: https://api.spacemesh.network
  tags:
  - AccountService
  properties:
  - type: OpenAPI
    url: openapi/spacemesh-accountservice-api-openapi.yml
  - type: Protobuf
    url: grpc/spacemesh/v2beta1/v2beta1.proto
  - type: Documentation
    url: https://github.com/spacemeshos/api
  - type: Protobuf
    url: grpc/spacemesh/v1/node.proto
- aid: spacemesh:spacemesh-activationservice-api
  name: Spacemesh ActivationService API
  description: The ActivationService API from Spacemesh — 6 operation(s) for activationservice.
  humanURL: https://github.com/spacemeshos/api
  baseURL: https://api.spacemesh.network
  tags:
  - ActivationService
  properties:
  - type: OpenAPI
    url: openapi/spacemesh-activationservice-api-openapi.yml
  - type: Protobuf
    url: grpc/spacemesh/v2beta1/v2beta1.proto
  - type: Documentation
    url: https://github.com/spacemeshos/api
  - type: Protobuf
    url: grpc/spacemesh/v1/node.proto
- aid: spacemesh:spacemesh-layerservice-api
  name: Spacemesh LayerService API
  description: The LayerService API from Spacemesh — 2 operation(s) for layerservice.
  humanURL: https://github.com/spacemeshos/api
  baseURL: https://api.spacemesh.network
  tags:
  - LayerService
  properties:
  - type: OpenAPI
    url: openapi/spacemesh-layerservice-api-openapi.yml
  - type: Protobuf
    url: grpc/spacemesh/v2beta1/v2beta1.proto
  - type: Documentation
    url: https://github.com/spacemeshos/api
  - type: Protobuf
    url: grpc/spacemesh/v1/node.proto
- aid: spacemesh:spacemesh-malfeasanceservice-api
  name: Spacemesh MalfeasanceService API
  description: The MalfeasanceService API from Spacemesh — 2 operation(s) for malfeasanceservice.
  humanURL: https://github.com/spacemeshos/api
  baseURL: https://api.spacemesh.network
  tags:
  - MalfeasanceService
  properties:
  - type: OpenAPI
    url: openapi/spacemesh-malfeasanceservice-api-openapi.yml
  - type: Protobuf
    url: grpc/spacemesh/v2beta1/v2beta1.proto
  - type: Documentation
    url: https://github.com/spacemeshos/api
  - type: Protobuf
    url: grpc/spacemesh/v1/node.proto
- aid: spacemesh:spacemesh-networkservice-api
  name: Spacemesh NetworkService API
  description: The NetworkService API from Spacemesh — 2 operation(s) for networkservice.
  humanURL: https://github.com/spacemeshos/api
  baseURL: https://api.spacemesh.network
  tags:
  - Network Service
  tags_raw:
  - NetworkService
  properties:
  - type: OpenAPI
    url: openapi/spacemesh-networkservice-api-openapi.yml
  - type: Protobuf
    url: grpc/spacemesh/v2beta1/v2beta1.proto
  - type: Documentation
    url: https://github.com/spacemeshos/api
  - type: Protobuf
    url: grpc/spacemesh/v1/node.proto
- aid: spacemesh:spacemesh-nodeservice-api
  name: Spacemesh NodeService API
  description: The NodeService API from Spacemesh — 2 operation(s) for nodeservice.
  humanURL: https://github.com/spacemeshos/api
  baseURL: https://api.spacemesh.network
  tags:
  - NodeService
  properties:
  - type: OpenAPI
    url: openapi/spacemesh-nodeservice-api-openapi.yml
  - type: Protobuf
    url: grpc/spacemesh/v2beta1/v2beta1.proto
  - type: Documentation
    url: https://github.com/spacemeshos/api
  - type: Protobuf
    url: grpc/spacemesh/v1/node.proto
- aid: spacemesh:spacemesh-rewardservice-api
  name: Spacemesh RewardService API
  description: The RewardService API from Spacemesh — 2 operation(s) for rewardservice.
  humanURL: https://github.com/spacemeshos/api
  baseURL: https://api.spacemesh.network
  tags:
  - RewardService
  properties:
  - type: OpenAPI
    url: openapi/spacemesh-rewardservice-api-openapi.yml
  - type: Protobuf
    url: grpc/spacemesh/v2beta1/v2beta1.proto
  - type: Documentation
    url: https://github.com/spacemeshos/api
  - type: Protobuf
    url: grpc/spacemesh/v1/node.proto
- aid: spacemesh:spacemesh-transactionservice-api
  name: Spacemesh TransactionService API
  description: The TransactionService API from Spacemesh — 8 operation(s) for transactionservice.
  humanURL: https://github.com/spacemeshos/api
  baseURL: https://api.spacemesh.network
  tags:
  - TransactionService
  properties:
  - type: OpenAPI
    url: openapi/spacemesh-transactionservice-api-openapi.yml
  - type: Protobuf
    url: grpc/spacemesh/v2beta1/v2beta1.proto
  - type: Documentation
    url: https://github.com/spacemeshos/api
  - type: Protobuf
    url: grpc/spacemesh/v1/node.proto
common:
- type: IssueTracker
  url: https://github.com/spacemeshos/go-spacemesh/issues
- type: Releases
  url: https://github.com/spacemeshos/go-spacemesh/releases
- type: SecurityPolicy
  url: https://github.com/spacemeshos/go-spacemesh/blob/develop/SECURITY.md
- type: CodeOfConduct
  url: https://github.com/spacemeshos/go-spacemesh/blob/develop/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/spacemeshos/go-spacemesh/blob/develop/CONTRIBUTING.md
- type: Overlay
  url: overlays/spacemesh-v1-overlay.yaml
- type: License
  name: MIT
  url: https://github.com/spacemeshos/go-spacemesh/blob/develop/LICENSE
- type: Website
  url: https://spacemesh.io
- type: GitHubOrganization
  url: https://github.com/spacemeshos
- type: SourceCode
  url: https://github.com/spacemeshos/go-spacemesh
- type: Documentation
  url: https://github.com/spacemeshos/api
- type: APIReference
  url: https://github.com/spacemeshos/api
- type: Protobuf
  url: grpc/spacemesh/v2beta1/v2beta1.proto
- type: Packages
  url: packages/spacemesh-packages.yml
- type: SDKs
  url: packages/spacemesh-packages.yml
- type: CLI
  url: cli/spacemesh-cli.yml
- type: X-MCPServerCandidate
  url: mcp/spacemesh-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/spacemesh-llms.txt
- type: Conventions
  url: conventions/spacemesh-conventions.yml
- type: ErrorCatalog
  url: errors/spacemesh-problem-types.yml
- type: Conformance
  url: conformance/spacemesh-conformance.yml
- type: Lifecycle
  url: lifecycle/spacemesh-lifecycle.yml
- type: ChangeLog
  url: changelog/spacemesh-changelog.yml
- type: DataModel
  url: data-model/spacemesh-data-model.yml
- type: AgenticAccess
  url: agentic-access/spacemesh-agentic-access.yml
- type: DomainSecurity
  url: security/spacemesh-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 20
  pass: local-v1
x-lifecycle:
  state: shuttered
  reason: domain-does-not-resolve
  observed: '2026-09-27'
  detail: The company's own domain returned no A or AAAA record when probed. This is an observation about the domain, not
    a request from the company.
  indexed: false

Spacemesh API — frequently asked questions

Does Spacemesh have an API?

Yes. APIs.io lists 8 APIs from Spacemesh, including Spacemesh AccountService API, Spacemesh ActivationService API and Spacemesh LayerService API, and 5 more.

Is there an OpenAPI specification for the Spacemesh API?

Yes. APIs.io indexes 8 OpenAPI specifications for Spacemesh, each linked for download from this page.

Is the Spacemesh API ready for AI agents?

Spacemesh has a Kin Score of 36.3 out of 100 (thin) and an Agent Readiness score of 16.0 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

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