Rindler

Rindler is a Y Combinator (Summer 2026) company that operates a hosted Model Context Protocol (MCP) server turning any pre-onboarded website — including sites that have no API — into a deterministic, typed set of tools that AI agents can reliably use. Agents open a session against a mapped site, dispatch a semantic action (search, add to cart, submit a form, move a candidate, pull a statement), and receive structured JSON records instead of raw HTML, accessibility trees, or DOM selectors. Rindler handles authentication, 2FA, pop-ups, bot defenses, navigation, retries, and error recovery server-side, and re-verifies each site mapping against the real site before shipping it. It targets legacy portals, private SaaS dashboards, government registries, healthcare/insurance portals, ATS systems, and bank/brokerage sites.

Rindler is listed with 1 API on the APIs.io network. Tagged areas include Company, MCP, AI Agents, Browser Automation, and Structured Data.

Rindler’s developer surface includes engineering blog, documentation, getting-started guide, pricing, signup flow, support, authentication, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.9/100 thin ▬ flat Agent 28/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessSelf serve

1 API 1 MCP Servers 1 Agent Skills

Company MCP AI Agents Browser Automation Structured DataWebsite to APIAgent Tools Y Combinator

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 28.9/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 8.8 / 17

Access Clarity 8.3 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 6.4 / 9

Regulatory Posture 3.5 / 15

Agent readiness — 28/100 · 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 5 / 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 6 / 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 Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →

7 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 Ask about this →
Operational Transparency scores 0.0 — up to +13.0 composite points Ask about this →
Contract Governance scores 0.0 — up to +12.0 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/rindler/apis.yml: open an issue on github.com/api-evangelist/rindler 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 3

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)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 1

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

Rindler MCP Server

Hosted MCP server (https://mcp.rindler.ai) that exposes mapped websites as deterministic, typed agent tools over HTTP with OAuth 2.0 PKCE. Core tools: start_session, dispatch_ac...

MCP Servers 1

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

Rindler MCP Server

Hosted MCP server that turns any pre-onboarded website, including sites without an API, into a deterministic, typed set of agent tools. Agents open a session on a mapped site, d...

MCP SERVER

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

Pull structured records from a mapped site with Rindler

AGENT SKILL

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

Rindler

9 quoted statements, read from Rindler's own page on 2026-11-10.

TERMS

Privacy & Data 1

Its role, the data it processes, retention and transfers, quoted from its own privacy page.

Rindler

19 quoted statements, read from Rindler's own page on 2026-11-10.

PRIVACY

Eligibility 1

Who may sign up and where, quoted from its own terms.

Rindler

2 quoted statements, read from Rindler's own page on 2026-11-10.

ELIGIBILITY

AI Preferences 1

Its stance on AI training, inference and agents, quoted from its own pages.

Rindler

2 quoted statements, read from Rindler's own page on 2026-11-10.

AI PREFS

Security Posture 2

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

Rindler Authentication

oauth2 · 1 scheme

SECURITY

Rindler Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Rindler Scopes

3 scopes · authorizationCode

3 scopes

SCOPES

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

AIPreferences

AIPreferences

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

MCPServer

WellKnown

AgentSkill

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

UsageTerms

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

DataProcessing

DataProcessing

Eligibility

Eligibility

Source (apis.yml)

aid: rindler
name: Rindler
description: Rindler is a Y Combinator (Summer 2026) company that operates a hosted Model Context Protocol (MCP) server turning
  any pre-onboarded website — including sites that have no API — into a deterministic, typed set of tools that AI agents can
  reliably use. Agents open a session against a mapped site, dispatch a semantic action (search, add to cart, submit a form,
  move a candidate, pull a statement), and receive structured JSON records instead of raw HTML, accessibility trees, or DOM
  selectors. Rindler handles authentication, 2FA, pop-ups, bot defenses, navigation, retries, and error recovery server-side,
  and re-verifies each site mapping against the real site before shipping it. It targets legacy portals, private SaaS dashboards,
  government registries, healthcare/insurance portals, ATS systems, and bank/brokerage sites.
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: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - scopes
  - security
  generated: '2026-11-13'
  method: derived
image: https://rindler.ai/logo.png
url: https://raw.githubusercontent.com/api-evangelist/rindler/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: company
x-tier-reason: enriched-from-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- MCP
- AI Agents
- Browser Automation
- Structured Data
- Website to API
- Agent Tools
- Y Combinator
tags_raw:
- Company
- MCP
- Model Context Protocol
- AI Agents
- Web Automation
- Browser Automation
- Structured Data
- Website to API
- Agent Tools
- Y Combinator
apis:
- name: Rindler MCP Server
  description: 'Hosted MCP server (https://mcp.rindler.ai) that exposes mapped websites as deterministic, typed agent tools
    over HTTP with OAuth 2.0 PKCE. Core tools: start_session, dispatch_action, extract_content, extract_document, close_session.'
  humanURL: https://rindler.ai/docs
  baseURL: https://mcp.rindler.ai
  tags:
  - MCP
  - AI Agents
  - Browser Automation
  tags_raw:
  - MCP
  - AI Agents
  - Web Automation
  properties:
  - type: MCPServer
    url: mcp/rindler-mcp.yml
  - type: Authentication
    url: authentication/rindler-authentication.yml
  - type: OAuthScopes
    url: scopes/rindler-scopes.yml
  - type: Conventions
    url: conventions/rindler-conventions.yml
  - type: WellKnown
    url: well-known/rindler-well-known.yml
  - type: AgentSkill
    url: skills/_index.yml
common:
- url: https://rindler.com/blog
  type: Blog
- type: Website
  url: https://rindler.ai
- type: DeveloperPortal
  url: https://rindler.ai/docs
- type: Documentation
  url: https://rindler.ai/docs
- type: GettingStarted
  url: https://rindler.ai/docs/quickstart
- type: Pricing
  url: https://rindler.ai/pricing
- type: SignUp
  url: https://chat.rindler.ai/?from=rindler-site
- type: TermsOfService
  url: https://rindler.ai/terms
- type: PrivacyPolicy
  url: https://rindler.ai/privacy
- type: Support
  url: https://rindler.ai/faq
- type: LLMsTxt
  url: llms/rindler-llms.txt
- type: MCPServer
  url: mcp/rindler-mcp.yml
- type: Authentication
  url: authentication/rindler-authentication.yml
- type: OAuthScopes
  url: scopes/rindler-scopes.yml
- type: Conventions
  url: conventions/rindler-conventions.yml
- type: WellKnown
  url: well-known/rindler-well-known.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DomainSecurity
  url: security/rindler-domain-security.yml
- type: UsageTerms
  url: terms/rindler-terms-of-service.yml
- type: DataProcessing
  url: privacy/rindler-privacy-policy.yml
- type: Eligibility
  url: eligibility/rindler-eligibility.yml
- type: AIPreferences
  url: ai-preferences/rindler-ai-preferences.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: 11
  pass: local-v1

Rindler API — frequently asked questions

Does Rindler have an API?

Yes. APIs.io lists 1 API from Rindler, including Rindler MCP Server.

How do I authenticate with the Rindler API?

Rindler documents its authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Rindler Authentication.

Does Rindler have an MCP server?

Yes. APIs.io lists 1 MCP server for Rindler: Hosted MCP server that turns any pre-onboarded website, including sites without an API, into a deterministic, typed set of agent tools. Agents open a session on a mapped site, dispatch a semantic acti

Is the Rindler API ready for AI agents?

Rindler has a Kin Score of 28.9 out of 100 (thin) and an Agent Readiness score of 28.2 (agent-aware), scored by API Evangelist on 2026-11-13.

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