Armature website screenshot

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 publishes 1 API on the APIs.io network. Tagged areas include Company, Agent Experience, Model Context Protocol, MCP, and Analytics.

Armature’s developer surface includes documentation, API reference, getting-started guide, signup flow, support, authentication, and 14 more developer resources.

29.0/100 emerging ▬ flat Agent 30/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
1 APIs 1 MCP Servers
CompanyAgent ExperienceModel Context ProtocolMCPAnalyticsObservabilityAI AgentsProduct AnalyticsDeveloper Tools

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 29.0/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 14.3 / 20
Commercial Clarity 4.7 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 30/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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 4 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/armature: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

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.yml

MCP SERVER

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

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Build 3

SDKs, sample code, and the tooling you integrate with

Access & Security 2

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 1

Pricing, plans, and the legal terms of use

Source (apis.yml)

apis.yml Raw ↑
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
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
image: https://mcp.armature.tech/frontend/assets/armature-icon.svg
created: '2026-07-17'
modified: '2026-07-18'
tags:
- 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: 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