Fearn

Fearn is the AI-native patent prosecution firm built for startups. It pairs former Big Law patent attorneys with proprietary, hallucination-resistant AI models built in-house by PhD computer scientists to take an invention from disclosure to a filing-ready provisional or non-provisional patent draft in minutes rather than the 50+ hours typical of traditional firms, at flat-rate pricing with automated labeled-figure generation and a money-back guarantee tied to claim allowance. Fearn self-hosts its entire AI infrastructure and uses no third-party model APIs, keeping invention disclosures confidential and compliant with SOC 2, ISO 27001, ISO 27701, and GDPR. Founded in 2025 and headquartered in San Francisco; backed by Kindred Ventures and a16z speedrun. Fearn is a legal-services company and does not currently publish a public developer API.

Fearn is profiled on the APIs.io network. Tagged areas include Company, Patents, Intellectual Property, Legal Tech, and Patent Prosecution.

Fearn’s developer surface includes pricing, engineering blog, support, signup flow, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub

18.6/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyPatentsIntellectual PropertyLegal TechPatent ProsecutionArtificial IntelligenceLegal ServicesStartups

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 18.6/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 1.3 / 20

Commercial Clarity 10.5 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 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

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/fearn: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Access & Security 2

Authentication, authorization, and security posture

Compliance

Compliance

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 4

The organization behind the API

Website

Website

About

About

Blog

Blog

LinkedIn

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: fearn
name: Fearn
description: Fearn is the AI-native patent prosecution firm built for startups. It pairs former Big Law patent attorneys with
  proprietary, hallucination-resistant AI models built in-house by PhD computer scientists to take an invention from disclosure
  to a filing-ready provisional or non-provisional patent draft in minutes rather than the 50+ hours typical of traditional
  firms, at flat-rate pricing with automated labeled-figure generation and a money-back guarantee tied to claim allowance.
  Fearn self-hosts its entire AI infrastructure and uses no third-party model APIs, keeping invention disclosures confidential
  and compliant with SOC 2, ISO 27001, ISO 27701, and GDPR. Founded in 2025 and headquartered in San Francisco; backed by
  Kindred Ventures and a16z speedrun. Fearn is a legal-services company and does not currently publish a public developer
  API.
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://framerusercontent.com/images/ttif87tkoRO6GG5JMASkJkb5To.png
url: https://raw.githubusercontent.com/api-evangelist/fearn/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- kindred-ventures
x-tier: profiled
x-tier-reason: non-api-services-company
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Patents
- Intellectual Property
- Legal Tech
- Patent Prosecution
- Artificial Intelligence
- Legal Services
- Startups
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://fearn.ai/
- type: About
  url: https://fearn.ai/about
- type: Pricing
  url: https://fearn.ai/pricing
- type: Blog
  url: https://fearn.ai/resources
- type: Support
  url: https://fearn.ai/contact
- type: SignUp
  url: https://app.fearn.ai/signup
- type: Login
  url: https://app.fearn.ai/signin
- type: TermsOfService
  url: https://fearn.ai/legal/terms
- type: PrivacyPolicy
  url: https://fearn.ai/legal/privacy
- type: Compliance
  url: https://fearn.ai/
- type: LinkedIn
  url: https://www.linkedin.com/company/fearn-ai
- type: X
  url: https://x.com/fearn_ai
- type: Conformance
  url: conformance/fearn-conformance.yml
- type: DomainSecurity
  url: security/fearn-domain-security.yml
- type: LLMsTxt
  url: llms/fearn-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence