LemonLime

LemonLime is a San Francisco company (Y Combinator, Summer 2026) building what it calls the AI knowledge layer for business — infrastructure that structures a company's documents, processes, customer history, and institutional knowledge into a foundation frontier models (GPT, Claude, Gemini) can retrieve and reason against. The platform connects to existing business systems (CRMs, document stores, ticketing, communication, and finance tools) over the Model Context Protocol (MCP), builds a structured representation of how the business operates, then deploys role- and workflow-specific AI agents on top of it, routing routine work to small fast models and reserving frontier reasoning models for tasks that need them. It is deliberately model-agnostic so the foundation survives frontier model generations. LemonLime does not train on customer business data on any plan, offers optional zero-data-retention, and markets compliance-aligned deployments for regulated industries. It sells a packaged SaaS product to non-technical teams and publishes no public developer API, SDKs, or API documentation as of this profile.

LemonLime is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Knowledge Management, AI Agents, and Workflow Automation.

LemonLime’s developer surface includes support, engineering blog, pricing, signup flow, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

29.0/100 thin ▬ flat Agent 0/100 human only Front door AI 3/6 light Heartbeat 95/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaidNo public API

0 APIs

Company Artificial Intelligence Knowledge Management AI Agents Workflow Automation MCP Enterprise Software Software-as-a-Service Y Combinator

Kin Score

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

Composite quality — 29.0/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 13.9 / 17

Operational Transparency 1.5 / 11

Contract Governance 1.9 / 10

Discoverability 4.7 / 9

Regulatory Posture 4.1 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

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 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
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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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

13 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 7.1 — up to +18.6 composite points
Operational Transparency scores 13.2 — up to +11.3 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/lemonlime/apis.yml: open an issue on github.com/api-evangelist/lemonlime 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 1

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)

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

LemonLime API pricing

Prices published by LemonLime, read 2026-10-07 from lemonlime.com/pricing.

Plan	Price
Business	999 Includes: Sales & marketing autopilot for a single business; daily leads with personalized outreach; branded c
Portfolio	2499 Includes: Manage up to 5 distinct businesses or brands; daily leads, content & opportunities; dedicated 24/7 p

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Lemonlime Plans Pricing

2 plans

PLANS

Security Posture 3

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

Lemonlime Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Lemonlime Vulnerability Disclosure

Hackerone · security.txt · contact published

SECURITY

Lemonlime Trust Center

SOC 2, GDPR, HIPAA, PCI DSS

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

Security

Security

Compliance

Compliance

VulnerabilityDisclosure

VulnerabilityDisclosure

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

ContactSales

ContactSales

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Website

About

Blog

Careers

Other 1

Properties that don't map to a standard resource type

KnowledgeBase

KnowledgeBase

Source (apis.yml)

aid: lemonlime
name: LemonLime
description: LemonLime is a San Francisco company (Y Combinator, Summer 2026) building what it calls the AI knowledge layer
  for business — infrastructure that structures a company's documents, processes, customer history, and institutional knowledge
  into a foundation frontier models (GPT, Claude, Gemini) can retrieve and reason against. The platform connects to existing
  business systems (CRMs, document stores, ticketing, communication, and finance tools) over the Model Context Protocol (MCP),
  builds a structured representation of how the business operates, then deploys role- and workflow-specific AI agents on top
  of it, routing routine work to small fast models and reserving frontier reasoning models for tasks that need them. It is
  deliberately model-agnostic so the foundation survives frontier model generations. LemonLime does not train on customer
  business data on any plan, offers optional zero-data-retention, and markets compliance-aligned deployments for regulated
  industries. It sells a packaged SaaS product to non-technical teams and publishes no public developer API, SDKs, or API
  documentation as of this profile.
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  gated: private
  gated_source:
  - x-api-posture
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://lemonlime.ai/lemonlime-logo.png
url: https://raw.githubusercontent.com/api-evangelist/lemonlime/refs/heads/main/apis.yml
x-api-posture: no-product-api
x-api-posture-basis: observed
x-api-posture-note: Real company profile harvested from the provider's own surface; no public API surface exists to catalog
  (no OpenAPI, no developer docs, no SDKs).
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-yc-batch: Summer 2026
x-location: San Francisco, CA, United States
x-tier: profile
x-tier-reason: Enriched from stub. Real company profile harvested from the provider's own surface; no public API surface exists
  to catalog (no OpenAPI, no developer docs, no SDKs).
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Artificial Intelligence
- Knowledge Management
- AI Agents
- Workflow Automation
- MCP
- Enterprise Software
- Software-as-a-Service
- Y Combinator
tags_raw:
- Company
- Artificial Intelligence
- Knowledge Management
- AI Agents
- Workflow Automation
- Model Context Protocol
- Enterprise Software
- SaaS
- Y Combinator
- Knowledge-Management
- Workflow-Automation
apis: []
common:
- type: Plans
  url: plans/lemonlime-plans-pricing.yml
- type: Website
  url: https://lemonlime.ai
- type: About
  url: https://lemonlime.ai/about
- type: KnowledgeBase
  url: https://lemonlime.ai/knowledge
- type: Support
  url: https://lemonlime.ai/support
- type: Blog
  url: https://lemonlime.ai/blog
- type: Pricing
  url: https://lemonlime.ai/pricing
- type: SignUp
  url: https://lemonlime.ai/signup
- type: Login
  url: https://lemonlime.ai/login
- type: ContactSales
  url: https://lemonlime.ai/contact-sales
- type: Careers
  url: https://lemonlime.ai/careers
- type: TermsOfService
  url: https://lemonlime.ai/terms
- type: PrivacyPolicy
  url: https://lemonlime.ai/privacy
- type: GitHubOrganization
  url: https://github.com/lemonlime-ai
- type: Security
  url: https://lemonlime.ai/security
- type: Compliance
  url: https://lemonlime.ai/security
- type: VulnerabilityDisclosure
  url: security/lemonlime-vulnerability-disclosure.yml
- type: TrustCenter
  url: security/lemonlime-trust-center.yml
- type: DomainSecurity
  url: security/lemonlime-domain-security.yml
- type: WellKnown
  url: well-known/lemonlime-well-known.yml
- type: LLMsTxt
  url: llms/lemonlime-llms.txt
- type: Conformance
  url: conformance/lemonlime-conformance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

LemonLime API — frequently asked questions

How much does the LemonLime API cost?

LemonLime publishes its prices; its Business plan is 999 as of 2026-10-07. APIs.io lists 2 pricing plans for LemonLime, with each plan's price, limits and inclusions under Pricing on this page.

Is the LemonLime API ready for AI agents?

LemonLime has a Kin Score of 29.0 out of 100 (thin) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-06.

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