Armature

Armature is a Y Combinator (Spring 2026) startup building product analytics for AI agent sessions. Instead of tracking clicks in a human UI, Armature captures how users interact with a product through Claude, ChatGPT, Claude Code, Cursor and other agents by way of MCP servers. Drop-in SDKs for TypeScript, Python and Go instrument an MCP server, streaming tool names, timing, outcomes and size-capped previews (with PII and secrets redacted before storage) to Armature, which reconstructs replayable, scored sessions. The platform clusters use cases by volume and pass rate, detects issues ranked by blast radius, and exposes a read-only hosted MCP server so teams can query their own agent-experience analytics from any MCP client. Armature also publishes an open "agent-review" Agent Skill that lets agents submit compact, privacy-safe experience reports about the software flows they use.

Armature is listed with 1 API on the APIs.io network. Tagged areas include Company, Agent Experience, MCP, Analytics, and Observability.

Armature’s developer surface includes documentation, API reference, getting-started guide, signup flow, support, authentication, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

26.7/100 thin ▬ flat Agent 31/100 agent ready Front door AI 5/6 prominent Heartbeat 67/100 slowing saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 1 MCP Servers 1 Agent Skills

Company Agent Experience MCP Analytics Observability AI Agents Product Analytics Developer Tools

Kin Score

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

Composite quality — 26.7/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 11.7 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.3 / 11

Contract Governance 1.9 / 10

Discoverability 6.4 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 0 / 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 0 / 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 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
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)

7 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Operational Transparency scores 2.6 — up to +12.7 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/armature/apis.yml: open an issue on github.com/api-evangelist/armature 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)	undeclared	-	-	2

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 4

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.

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 1

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

Armature MCP Analytics

Armature's programmable surface: an ingest API fed by the TypeScript/Python/Go MCP-analytics SDKs, and a read-only hosted MCP server (mcp.armature.tech) that serves reconstructe...

MCP Servers 1

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

Armature MCP Server

Remote MCP server at mcp.armature.tech over HTTP; 6 tools listed.

MCP SERVER

Agent Skills 1

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

agent-review

AGENT SKILL

Security Posture 2

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

Armature Authentication

oauth2/http · 3 schemes

SECURITY

Armature Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

AgentSkill

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Conformance

Conformance

DataModel

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: armature
name: Armature
description: Armature is a Y Combinator (Spring 2026) startup building product analytics for AI agent sessions. Instead of
  tracking clicks in a human UI, Armature captures how users interact with a product through Claude, ChatGPT, Claude Code,
  Cursor and other agents by way of MCP servers. Drop-in SDKs for TypeScript, Python and Go instrument an MCP server, streaming
  tool names, timing, outcomes and size-capped previews (with PII and secrets redacted before storage) to Armature, which
  reconstructs replayable, scored sessions. The platform clusters use cases by volume and pass rate, detects issues ranked
  by blast radius, and exposes a read-only hosted MCP server so teams can query their own agent-experience analytics from
  any MCP client. Armature also publishes an open "agent-review" Agent Skill that lets agents submit compact, privacy-safe
  experience reports about the software flows they use.
url: https://raw.githubusercontent.com/api-evangelist/armature/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: enriched
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
image: https://mcp.armature.tech/frontend/assets/armature-icon.svg
created: '2026-07-17'
modified: '2026-07-18'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-19
tags:
- Company
- Agent Experience
- MCP
- Analytics
- Observability
- AI Agents
- Product Analytics
- Developer Tools
tags_raw:
- Company
- Agent Experience
- Model Context Protocol
- MCP
- Analytics
- Observability
- AI Agents
- Product Analytics
- Developer Tools
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Armature MCP Analytics
  description: 'Armature''s programmable surface: an ingest API fed by the TypeScript/Python/Go MCP-analytics SDKs, and a
    read-only hosted MCP server (mcp.armature.tech) that serves reconstructed sessions, use-case clusters and ranked issues
    to any MCP client. Bearer-token or OAuth authenticated.'
  humanURL: https://docs.armature.tech
  baseURL: https://mcp.armature.tech
  properties:
  - type: Documentation
    url: https://docs.armature.tech
  - type: MCPServer
    url: mcp/armature-mcp.yml
  - type: Authentication
    url: authentication/armature-authentication.yml
common:
- type: Website
  url: https://www.armature.tech/
- type: DeveloperPortal
  url: https://docs.armature.tech
- type: Documentation
  url: https://docs.armature.tech
- type: APIReference
  url: https://docs.armature.tech/armature-mcp/tools
- type: GettingStarted
  url: https://docs.armature.tech/quickstart
- type: SignUp
  url: https://app.armature.tech
- type: Login
  url: https://app.armature.tech
- type: GitHubOrganization
  url: https://github.com/armature-tech
- type: Support
  url: mailto:contact@armature.tech
- type: PrivacyPolicy
  url: https://docs.armature.tech/security/privacy
- type: Packages
  url: packages/armature-packages.yml
- type: SDKs
  url: packages/armature-packages.yml
- type: MCPServer
  url: mcp/armature-mcp.yml
- type: LLMsTxt
  url: llms/armature-llms.txt
- type: Authentication
  url: authentication/armature-authentication.yml
- type: AgentSkill
  url: skills/armature-agent-review.md
- type: Conventions
  url: conventions/armature-conventions.yml
- type: Conformance
  url: conformance/armature-conformance.yml
- type: DataModel
  url: data-model/armature-data-model.yml
- type: WellKnown
  url: well-known/armature-well-known.yml
- type: DomainSecurity
  url: security/armature-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Armature API — frequently asked questions

Does Armature have an API?

Yes. APIs.io lists 1 API from Armature, including Armature MCP Analytics.

How do I authenticate with the Armature API?

Armature documents its authentication (oauth2/http · 3 schemes). The details are profiled on APIs.io as Armature Authentication.

Does Armature have an MCP server?

Yes. APIs.io lists 1 MCP server for Armature: Remote MCP server at mcp.armature.tech over HTTP; 6 tools listed.

Is the Armature API ready for AI agents?

Armature has a Kin Score of 26.7 out of 100 (thin) and an Agent Readiness score of 30.9 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
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.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

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Every operation they expose

curl "https://apis.io/api/v1/providers/armature/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/armature/evidence"

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