Stacks

Stacks is a company surfaced via the API Evangelist harvest backlog (source: vc-portfolio; backed by union-square-ventures) and added to the network as a stub for full-pipeline profiling.

Stacks is listed with 3 APIs on the APIs.io network: api API, core API, and stacks.js API. Tagged areas include Bitcoin Staking, Self‑Custodial, DeFi, Smart Contracts, and Layer‑2.

The Stacks catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Stacks’ developer surface includes changelog, sandbox, authentication, engineering blog, getting-started guide, documentation, API reference, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

29.9/100 thin Agent 15/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

3 APIs

Bitcoin StakingSelf‑CustodialDeFi Smart ContractsLayer‑2Institutional Crypto

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 29.9/100 · thin

Contract Quality 5.3 / 21

Developer Ergonomics 8.5 / 17

Access Clarity 0.0 / 17

Operational Transparency 4.1 / 11

Contract Governance 2.0 / 10

Discoverability 5.3 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 15/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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

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

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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<a href="https://apis.io/providers/blockstack-org/"><img src="https://apis.io/badge/blockstack-org/card.svg" alt="Stacks on APIs.io — Kin Score by API Evangelist"></a>

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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
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
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

12 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 25.1 — up to +18.7 composite points
Developer Ergonomics scores 50.0 — up to +10.0 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/blockstack-org/apis.yml: open an issue on github.com/api-evangelist/blockstack-org 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 →

APIs 3

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

Stacks api API

Stacks api API as documented publicly: 28 operations. Contract generated from the documentation by API Evangelist (2026-10-24); not the provider's own document.

Stacks core API

Stacks core API as documented publicly: 7 operations. Contract generated from the documentation by API Evangelist (2026-10-24); not the provider's own document.

Stacks stacks.js API

Stacks stacks.js API as documented publicly: 3 operations. Contract generated from the documentation by API Evangelist (2026-10-24); not the provider's own document.

Semantic Vocabularies 1

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

Blockstack Org Context

34 classes · 33 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Stacks API Rules

10 rules · 9 errors 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

GetV2AccountsPrincipalResponse

6 properties

JSON SCHEMA

PostConstructionMetadataResponse

5 properties

JSON SCHEMA

PostConstructionPayloadsResponse

5 properties

JSON SCHEMA

PostConstructionPreprocessRequest

2 properties

JSON SCHEMA

PostConstructionPreprocessResponse

5 properties

JSON SCHEMA

PostDepositRequest

7 properties

JSON SCHEMA

Security Posture 2

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

Blockstack Org Authentication

1 scheme

SECURITY

Blockstack Org Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Sandbox

Sandbox

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conventions

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

Security

Security

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Roadmap

Roadmap

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: blockstack-org
name: Stacks
image: https://cdn.prod.website-files.com/618b0aafa4afde65f2fe38fe/6834ec468b986650406f513f_webp-stacks-bitcoin-layer-smart-contracts-header.webp
description: 'Stacks is a company surfaced via the API Evangelist harvest backlog (source: vc-portfolio; backed by union-square-ventures)
  and added to the network as a stub for full-pipeline profiling.'
url: https://raw.githubusercontent.com/api-evangelist/blockstack-org/refs/heads/main/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-24 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-24'
modified: '2026-10-24'
tags:
- Bitcoin Staking
- Self‑Custodial
- DeFi
- Smart Contracts
- Layer‑2
- Institutional Crypto
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/blockstack-org-rules.yml
- type: JSONLD
  url: json-ld/blockstack-org-context.jsonld
- type: Vocabulary
  url: vocabulary/blockstack-org-vocabulary.yml
- type: DataModel
  url: data-model/blockstack-org-data-model.yml
- type: ChangeLog
  url: changelog/blockstack-org-changelog.yml
- type: Conventions
  url: conventions/blockstack-org-conventions.yml
- type: Sandbox
  url: sandbox/blockstack-org-sandbox.yml
- type: Authentication
  url: authentication/blockstack-org-authentication.yml
- type: Conformance
  url: conformance/blockstack-org-conformance.yml
- type: LLMsTxt
  url: llms/blockstack-org-llms.txt
- type: WellKnown
  url: well-known/blockstack-org-well-known.yml
- type: Hosts
  url: hosts/blockstack-org-hosts.yml
- type: Vendors
  url: vendors/blockstack-org-vendors.yml
- type: Security
  url: https://www.stacks.co/build/security
- type: Roadmap
  url: https://www.stacks.co/roadmap
- type: GitHubOrganization
  url: https://github.com/alexgo-io
- type: Blog
  url: https://www.stacks.co/blog
- type: GettingStarted
  url: https://docs.stacks.co/get-started/developer-quickstart
- type: Documentation
  url: https://docs.blockstack.org/
- type: APIReference
  url: https://docs.stacks.co/reference/api/stacks-blockchain-api.md
- type: DomainSecurity
  url: security/blockstack-org-domain-security.yml
- type: Website
  url: https://www.blockstack.org
apis:
- aid: blockstack-org:api-api
  name: Stacks api API
  description: 'Stacks api API as documented publicly: 28 operations. Contract generated from the documentation by API Evangelist
    (2026-10-24); not the provider''s own document.'
  humanURL: https://docs.stacks.co/reference/api
  baseURL: https://api.hiro.so
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/blockstack-org-api-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/blockstack-org-post-deposit-request-schema.json
  - type: JSONSchema
    url: json-schema/blockstack-org-post-construction-preprocess-request-schema.json
  - type: JSONSchema
    url: json-schema/blockstack-org-get-v2-accounts-principal-response-schema.json
  - type: JSONSchema
    url: json-schema/blockstack-org-post-construction-metadata-response-schema.json
  - type: JSONSchema
    url: json-schema/blockstack-org-post-construction-payloads-response-schema.json
  - type: JSONSchema
    url: json-schema/blockstack-org-post-construction-preprocess-response-schema.json
- aid: blockstack-org:core-api
  name: Stacks core API
  description: 'Stacks core API as documented publicly: 7 operations. Contract generated from the documentation by API Evangelist
    (2026-10-24); not the provider''s own document.'
  humanURL: https://docs.stacks.co/reference/clarinet
  baseURL: https://api.hiro.so
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/blockstack-org-core-openapi-generated.yml
    x-provenance: generated
- aid: blockstack-org:stacks.js-api
  name: Stacks stacks.js API
  description: 'Stacks stacks.js API as documented publicly: 3 operations. Contract generated from the documentation by API
    Evangelist (2026-10-24); not the provider''s own document.'
  humanURL: https://docs.stacks.co/reference/stacks.js
  baseURL: https://api.hiro.so
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/blockstack-org-stacks.js-openapi-generated.yml
    x-provenance: generated
x-backed-by:
- union-square-ventures
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Docs are rendered via JavaScript and no machine‑readable OpenAPI spec was found.
  evidence:
  - url: https://stacks.co/developers
    status: 200
  checked: '2026-10-24'
x-enrichment:
  date: '2026-10-24'
  status: enriched
  artifacts_added: 30
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Stacks API — frequently asked questions

Does Stacks have an API?

Yes. APIs.io lists 3 APIs from Stacks, including Stacks api API, Stacks core API and Stacks stacks.js API.

Is there an OpenAPI specification for the Stacks API?

Yes. APIs.io indexes 3 OpenAPI specifications for Stacks, each linked for download from this page.

How do I authenticate with the Stacks API?

Stacks uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Blockstack Org Authentication.

Is the Stacks API ready for AI agents?

Stacks has a Kin Score of 29.9 out of 100 (thin) and an Agent Readiness score of 15.1 (agent-aware), scored by API Evangelist on 2026-10-31.

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
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