Zatanna

Zatanna is a Y Combinator (W2026) startup based in San Francisco that creates APIs for software that doesn't have any. It reverse-engineers the back ends of web-based cloud and on-prem software — ERPs (SAP), PMS/POS systems, insurance portals, and marketplaces — by observing real workflows, reconstructing the underlying request sequences, and hosting them as clean, callable APIs. Rather than relying on slow browser automation or computer-use agents, Zatanna gives AI agents faster, cheaper, and more reliable integrations, with a reliability layer that handles session management, authentication, and change detection. The agent-facing surface is a hosted, OAuth-protected Model Context Protocol (MCP) server at api.zatanna.ai.

Zatanna publishes 1 API on the APIs.io network. Tagged areas include Company, API, MCP, AI Agents, and Integration.

🌐 Visit website 📡 Source on GitHub

13.5/100 minimal ▬ flat Agent 4/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

1 APIs 1 MCP Servers

CompanyAPIMCPAI AgentsIntegrationReverse EngineeringAutomationOAuthY Combinator

Kin Score

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

Composite quality — 13.5/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 4.2 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 4/100 · 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 4 / 4

Consent & Bot Identity 0 / 3

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APIs 1

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

Zatanna MCP Server

Zatanna's hosted, remote Model Context Protocol (MCP) server — the agent-facing surface of its reverse-engineered portal integrations. Live at https://api.zatanna.ai/mcp over St...

MCP Servers 1

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

Scopes 1

OAuth scopes governing access to this provider's APIs.

Zatanna Scopes

4 scopes

SCOPES

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: zatanna
name: Zatanna
description: Zatanna is a Y Combinator (W2026) startup based in San Francisco that creates APIs for software that doesn't
  have any. It reverse-engineers the back ends of web-based cloud and on-prem software — ERPs (SAP), PMS/POS systems, insurance
  portals, and marketplaces — by observing real workflows, reconstructing the underlying request sequences, and hosting them
  as clean, callable APIs. Rather than relying on slow browser automation or computer-use agents, Zatanna gives AI agents
  faster, cheaper, and more reliable integrations, with a reliability layer that handles session management, authentication,
  and change detection. The agent-facing surface is a hosted, OAuth-protected Model Context Protocol (MCP) server at api.zatanna.ai.
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://raw.githubusercontent.com/api-evangelist/zatanna/refs/heads/main/apis.yml
url: https://raw.githubusercontent.com/api-evangelist/zatanna/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
x-yc-batch: W2026
x-location: San Francisco, CA
x-founders:
- Tarun Vedula (CEO)
- Alex Blackwell (CTO)
- Rithvik Vanga
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 9
  pass: local-v1
tags:
- Company
- API
- MCP
- AI Agents
- Integration
- Reverse Engineering
- Automation
- OAuth
- Y Combinator
apis:
- name: Zatanna MCP Server
  description: Zatanna's hosted, remote Model Context Protocol (MCP) server — the agent-facing surface of its reverse-engineered
    portal integrations. Live at https://api.zatanna.ai/mcp over Streamable HTTP (JSON-RPC), gated by OAuth 2.0 (Authorization
    Code + PKCE, dynamic client registration) or a Zatanna API key. The tool list is not enumerable without credentials.
  humanURL: https://www.zatanna.ai/
  baseURL: https://api.zatanna.ai
  tags:
  - MCP
  - AI Agents
  - OAuth
  properties:
  - type: MCPServer
    url: mcp/zatanna-mcp.yml
  - type: Authentication
    url: authentication/zatanna-authentication.yml
  - type: OAuthScopes
    url: scopes/zatanna-scopes.yml
  - type: Conformance
    url: conformance/zatanna-conformance.yml
common:
- type: Website
  url: https://www.zatanna.ai/
- type: TermsOfService
  url: https://www.zatanna.ai/terms
- type: PrivacyPolicy
  url: https://www.zatanna.ai/privacy
- type: WellKnown
  url: well-known/zatanna-well-known.yml
- type: LLMsTxt
  url: llms/zatanna-llms.txt
- type: DomainSecurity
  url: security/zatanna-domain-security.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io