Stilta

Stilta is an agentic AI platform for high-stakes patent and intellectual property work, backed by a16z, NVIDIA, and Y Combinator (W26). Its agents automate evidence gathering and analysis across 180M+ patents, scientific literature, and archived web content to deliver source-cited invalidity analysis, infringement analysis, and freedom-to-operate assessments for in-house IP teams and intellectual property law firms. The platform markets a defensible first answer in roughly seventeen minutes, fully autonomous, with citations pulled from original documents. Stilta exposes a first-party backend API (api.stilta.com, "Patrona Patent Search Platform API") and a PropelAuth-based OpenID Connect identity surface at auth.stilta.com, but does not publish public developer documentation, an OpenAPI specification, or SDKs at this time. This profile was surfaced as an a16z / Y Combinator portfolio company and enriched from Stilta's public web surface.

Stilta is listed with 1 API on the APIs.io network. Tagged areas include Company, Patents, Intellectual Property, Legal Tech, and Artificial Intelligence.

Stilta’s developer surface includes support, engineering blog, authentication, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

20.5/100 emerging ▬ flat Agent 23/100 agent aware Front door AI 6/6 dominant Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 1 MCP Servers

Company Patents Intellectual Property Legal Tech Artificial Intelligence AI Agents Patent Search Prior Art

Kin Score

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

Composite quality — 20.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 7.4 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 5.8 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 23/100 · agent aware

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 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 0 / 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)

9 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
Developer Ergonomics scores 19.0 — up to +16.2 composite points
Operational Transparency scores 0.0 — up to +13.0 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/stilta/apis.yml: open an issue on github.com/api-evangelist/stilta 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 →

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

APIs 1

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

Stilta Platform API

First-party backend API for the Stilta / Patrona patent search platform. Live and rate-limited (600 req window observed) but undocumented publicly — no OpenAPI, no developer doc...

MCP Servers 1

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

Stilta MCP Server

Remote MCP server at mcp.stilta.com over HTTP.

MCP SERVER

Security Posture 3

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

Stilta Authentication

openIdConnect/oauth2 · 2 schemes

SECURITY

Stilta Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Stilta Trust Center

SOC 2, ISO 27001, GDPR

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

Compliance

DomainSecurity

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 3

The organization behind the API

Website

Website

Blog

Blog

Careers

Careers

Source (apis.yml)

aid: stilta
name: Stilta
description: Stilta is an agentic AI platform for high-stakes patent and intellectual property work, backed by a16z, NVIDIA,
  and Y Combinator (W26). Its agents automate evidence gathering and analysis across 180M+ patents, scientific literature,
  and archived web content to deliver source-cited invalidity analysis, infringement analysis, and freedom-to-operate assessments
  for in-house IP teams and intellectual property law firms. The platform markets a defensible first answer in roughly seventeen
  minutes, fully autonomous, with citations pulled from original documents. Stilta exposes a first-party backend API (api.stilta.com,
  "Patrona Patent Search Platform API") and a PropelAuth-based OpenID Connect identity surface at auth.stilta.com, but does
  not publish public developer documentation, an OpenAPI specification, or SDKs at this time. This profile was surfaced as
  an a16z / Y Combinator portfolio company and enriched from Stilta's public web surface.
url: https://raw.githubusercontent.com/api-evangelist/stilta/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- y-combinator
- nvidia
x-tier: stub
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'
created: '2026-07-17'
modified: '2026-07-21'
image: https://www.stilta.com/favicon.ico
tags:
- Company
- Patents
- Intellectual Property
- Legal Tech
- Artificial Intelligence
- AI Agents
- Patent Search
- Prior Art
tags_raw:
- Company
- Patents
- Intellectual Property
- Legal Tech
- Artificial Intelligence
- Agentic AI
- Patent Search
- Prior Art
apis:
- name: Stilta Platform API
  description: First-party backend API for the Stilta / Patrona patent search platform. Live and rate-limited (600 req window
    observed) but undocumented publicly — no OpenAPI, no developer docs (docs_url is null; /openapi.json and /docs return
    404). Included for host coverage; not a published developer product.
  humanURL: https://www.stilta.com
  baseURL: https://api.stilta.com
  x-documented: false
  properties:
  - type: WellKnown
    url: well-known/stilta-well-known.yml
  - type: Authentication
    url: authentication/stilta-authentication.yml
common:
- type: TrustCenter
  url: security/stilta-trust-center.yml
- type: Compliance
  url: https://trust.stilta.com/
- type: DomainSecurity
  url: security/stilta-domain-security.yml
- type: Website
  url: https://www.stilta.com
- type: Login
  url: https://auth.stilta.com/en/login
- type: PrivacyPolicy
  url: https://www.stilta.com/dpa/privacy-policy
- type: TermsOfService
  url: https://www.stilta.com/dpa/terms
- type: Support
  url: https://www.stilta.com/contact-us
- type: Blog
  url: https://www.stilta.com/news-page
- type: Careers
  url: https://www.stilta.com/careers
- type: WellKnown
  url: well-known/stilta-well-known.yml
- type: Authentication
  url: authentication/stilta-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 4
  pass: local-v1

Stilta API — frequently asked questions

Does Stilta have an API?

Yes. APIs.io lists 1 API from Stilta, including Stilta Platform API.

How do I authenticate with the Stilta API?

Stilta documents its authentication (openIdConnect/oauth2 · 2 schemes). The details are profiled on APIs.io as Stilta Authentication.

Does Stilta have an MCP server?

Yes. APIs.io lists 1 MCP server for Stilta: Remote MCP server at mcp.stilta.com over HTTP.

Is the Stilta API ready for AI agents?

Stilta has a Kin Score of 20.5 out of 100 (emerging) and an Agent Readiness score of 23.0 (agent-aware), scored by API Evangelist on 2026-11-06.

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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.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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