O11

O11 is a Y Combinator (Winter 2026) startup building custom AI software for financial services firms. Rather than forcing teams onto a new external platform, O11 embeds AI-driven automation directly into the tools finance teams already use every day — Excel, PowerPoint, Word, and other enterprise applications — so users can generate presentations, spreadsheets, and documents and automate workflows without switching contexts. The company positions itself against the observation that a majority of firms still rely on legacy software where generic bolt-on AI features fail to deliver real value. As of this profile O11 publishes a marketing site (o11.ai) but no public developer API, OpenAPI specification, SDKs, or developer documentation could be found; this remains an early-stage identity profile in the API Evangelist network awaiting a public API surface.

O11 is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Financial Services, Fintech, and Workflow Automation.

O11’s developer surface includes pricing, engineering blog, and 4 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

11.2/100 emerging ▬ flat Agent 0/100 human only Front door AI 4/6 moderate Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

0 APIs

Company Artificial Intelligence Financial Services Fintech Workflow Automation Enterprise Software Document Generation Y Combinator

Kin Score

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

Composite quality — 11.2/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 6.3 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 0.8 / 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 2.4 — up to +19.5 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/o11/apis.yml: open an issue on github.com/api-evangelist/o11 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
PDF and Document Standards (PDF tooling, document signing trust, invoice documents)	undeclared	-	-	1

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.

O11 API pricing

Prices published by O11, read 2026-10-07 from o11.ai/pricing.

Plan	Price
Launch	$149/mo per workspace Includes: Includes 500 automated messages per month
Starter	$499/mo per workspace Includes: Includes 2,500 automated messages per month
Growth	$1,499/mo per workspace Includes: Includes 10,000 automated messages per month
Enterprise	Custom Includes: Custom message volume; Everything in Growth; Recording analysis; Conversation analysis; High-volume
iMessage	$399/month per phone number

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

O11 Plans Pricing

5 plans

PLANS

Security Posture 1

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

O11 Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Company

Company

Source (apis.yml)

aid: o11
name: O11
description: O11 is a Y Combinator (Winter 2026) startup building custom AI software for financial services firms. Rather
  than forcing teams onto a new external platform, O11 embeds AI-driven automation directly into the tools finance teams already
  use every day — Excel, PowerPoint, Word, and other enterprise applications — so users can generate presentations, spreadsheets,
  and documents and automate workflows without switching contexts. The company positions itself against the observation that
  a majority of firms still rely on legacy software where generic bolt-on AI features fail to deliver real value. As of this
  profile O11 publishes a marketing site (o11.ai) but no public developer API, OpenAPI specification, SDKs, or developer documentation
  could be found; this remains an early-stage identity profile in the API Evangelist network awaiting a public API surface.
url: https://raw.githubusercontent.com/api-evangelist/o11/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Artificial Intelligence
- Financial Services
- Fintech
- Workflow Automation
- Enterprise Software
- Document Generation
- Y Combinator
tags_raw:
- Company
- Artificial Intelligence
- Financial Services
- Fintech
- Workflow Automation
- Enterprise Software
- Document Generation
- Y Combinator
- Financial-Services
- Workflow-Automation
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/o11.png
apis: []
common:
- type: Pricing
  url: https://o11.ai/pricing
- type: Plans
  url: plans/o11-plans-pricing.yml
- url: https://o11.ai/blog
  type: Blog
- type: DomainSecurity
  url: security/o11-domain-security.yml
- type: Website
  url: https://o11.ai
- type: Company
  url: https://www.ycombinator.com/companies/o11
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1

O11 API — frequently asked questions

How much does the O11 API cost?

O11 publishes its prices; its Launch plan is $149/mo per workspace as of 2026-10-07. APIs.io lists 5 pricing plans for O11, with each plan's price, limits and inclusions under Pricing on this page.

Is the O11 API ready for AI agents?

O11 has a Kin Score of 11.2 out of 100 (emerging) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-06.

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