Syntropy

Syntropy is an autonomous, agentic coding application built for complex, long-horizon software engineering tasks. A developer describes a feature in natural language and Syntropy plans, writes, and tests the implementation, returning a production-ready pull request without the developer having to manage a terminal or an IDE agent session by hand. The product emphasizes large-context handling for heavy, real-world codebases ("no context ceiling, no truncation"), supports custom Model Context Protocol (MCP) integrations so it can pull in a team's own tools, and joins Slack to post updates as tasks complete. Syntropy is a Y Combinator (Winter 2026) company based in San Francisco, founded by Saahil Sundaresan and Andrew Kuik. As of this profile it ships as a hosted end-user coding product and does not publish a public developer API, SDK, or API documentation.

Syntropy is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, AI Agents, Agentic Coding, and Developer Tools.

Syntropy’s developer surface includes signup flow and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub

9.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyArtificial IntelligenceAI AgentsAgentic CodingDeveloper ToolsCode GenerationSoftware DevelopmentAutomationModel Context Protocol

Kin Score

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

Composite quality — 9.4/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 2.6 / 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/syntropy: 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 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: syntropy
name: Syntropy
description: Syntropy is an autonomous, agentic coding application built for complex, long-horizon software engineering tasks.
  A developer describes a feature in natural language and Syntropy plans, writes, and tests the implementation, returning
  a production-ready pull request without the developer having to manage a terminal or an IDE agent session by hand. The product
  emphasizes large-context handling for heavy, real-world codebases ("no context ceiling, no truncation"), supports custom
  Model Context Protocol (MCP) integrations so it can pull in a team's own tools, and joins Slack to post updates as tasks
  complete. Syntropy is a Y Combinator (Winter 2026) company based in San Francisco, founded by Saahil Sundaresan and Andrew
  Kuik. As of this profile it ships as a hosted end-user coding product and does not publish a public developer API, SDK,
  or API documentation.
url: https://raw.githubusercontent.com/api-evangelist/syntropy/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
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
image: https://syntropy.io/og-image.png
tags:
- Company
- Artificial Intelligence
- AI Agents
- Agentic Coding
- Developer Tools
- Code Generation
- Software Development
- Automation
- Model Context Protocol
apis: []
common:
- type: DomainSecurity
  url: security/syntropy-domain-security.yml
- type: Website
  url: https://syntropy.io/
- type: SignUp
  url: https://syntropy.io/signup
- type: X
  url: https://x.com/Syntropy
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 1
  pass: local-v1