Synthesis AI

Synthesis AI was a San Francisco synthetic-data company, founded in 2019 by Yashar Behzadi, that generated photorealistic, pixel-perfectly labeled images of humans for training computer-vision models. It sold that capability as an API: FaceAPI for labeled facial imagery and, from November 2021, HumanAPI for whole-body 3D digital humans, plus an Identities API for selecting subjects. Jobs were described as JSON documents (identities, expressions, gaze, head turn, hair, accessories, bodies and clothing, gesture animations, camera and light rigs, HDRI environments) and submitted through a command-line client or web console, with rendered output downloaded by job ID. The company raised a $17M Series A in 2022 on more than $24M total funding and was dissolved during 2024-2025. Its API is gone: synthesis.ai is a parked Gandi holding page reachable only over HTTP, and docs.synthesis.ai and api.synthesis.ai no longer resolve. What survives publicly is the Synthesis-AI-Dev GitHub organization (17 public repositories, including the Human API input-JSON appendix and the client tooling) and the official synthesisai package on PyPI.

Synthesis AI is profiled on the APIs.io network. Tagged areas include Company, Synthetic Data, Computer Vision, Machine Learning, and Artificial Intelligence.

Synthesis AI’s developer surface includes code examples and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
5.7/100 minimal ▬ flat Agent 2/100 human only Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0
0 APIs
CompanySynthetic DataComputer VisionMachine LearningArtificial IntelligenceDigital HumansTraining Data3D

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 5.7/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 5.0 / 10
Agent readiness — 2/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 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
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/synthesis-ai: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Examples 1

Example request and response payloads for these APIs.

Synthesis Ai Human Api Job Complex Example

2 fields

EXAMPLE

Security Posture 1

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

Synthesis Ai Domain Security

no transport/DNS hardening detected

SECURITY

Resources

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 Examples
Examples

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 2

The organization behind the API

Website
Website
 LinkedIn
LinkedIn

Other 1

Properties that don't map to a standard resource type

SecondaryMarket
SecondaryMarket

Source (apis.yml)

apis.yml Raw ↑ 
aid: synthesis-ai
name: Synthesis AI
description: 'Synthesis AI was a San Francisco synthetic-data company, founded in 2019 by Yashar Behzadi, that generated photorealistic,
  pixel-perfectly labeled images of humans for training computer-vision models. It sold that capability as an API: FaceAPI
  for labeled facial imagery and, from November 2021, HumanAPI for whole-body 3D digital humans, plus an Identities API for
  selecting subjects. Jobs were described as JSON documents (identities, expressions, gaze, head turn, hair, accessories,
  bodies and clothing, gesture animations, camera and light rigs, HDRI environments) and submitted through a command-line
  client or web console, with rendered output downloaded by job ID. The company raised a $17M Series A in 2022 on more than
  $24M total funding and was dissolved during 2024-2025. Its API is gone: synthesis.ai is a parked Gandi holding page reachable
  only over HTTP, and docs.synthesis.ai and api.synthesis.ai no longer resolve. What survives publicly is the Synthesis-AI-Dev
  GitHub organization (17 public repositories, including the Human API input-JSON appendix and the client tooling) and the
  official synthesisai package on PyPI.'
url: https://raw.githubusercontent.com/api-evangelist/synthesis-ai/refs/heads/main/apis.yml
image: https://avatars.githubusercontent.com/u/55990723?v=4
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-08-05'
modified: '2026-08-05'
tags:
- Company
- Synthetic Data
- Computer Vision
- Machine Learning
- Artificial Intelligence
- Digital Humans
- Training Data
- 3D
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: http://synthesis.ai/
- type: GitHubOrganization
  url: https://github.com/Synthesis-AI-Dev
- type: LinkedIn
  url: https://www.linkedin.com/company/synthesis-ai
- type: SecondaryMarket
  url: https://forgeglobal.com/synthesis-ai_stock/
- type: Packages
  url: packages/synthesis-ai-packages.yml
- type: Lifecycle
  url: lifecycle/synthesis-ai-lifecycle.yml
- type: DomainSecurity
  url: security/synthesis-ai-domain-security.yml
- type: Examples
  name: Human API job request (complex example, verbatim from the provider's GitHub)
  url: examples/synthesis-ai-human-api-job-complex-example.json
x-enrichment:
  date: '2026-08-05'
  status: minimal
  artifacts_added: 4
  pass: local-v1
x-coverage:
  state: none
  reason: defunct
  detail: Synthesis AI was dissolved during 2024-2025 — synthesis.ai now answers only over HTTP with a Gandi "parked by the
    owner" page (the identical 2332-byte body is returned for every path, including a control path, so every 200 is a soft-404),
    and the FaceAPI/HumanAPI documentation host docs.synthesis.ai has been removed from DNS entirely.
  evidence:
  - url: http://synthesis.ai/
    status: 200
  - url: http://synthesis.ai/openapi.json
    status: 200
  - url: http://synthesis.ai/this-path-does-not-exist-ae-control-12345
    status: 200
  - url: https://docs.synthesis.ai/
    status: 0
  checked: '2026-08-05'