# Defined.ai (DefinedCrowd)

**Canonical:** https://apis.io/providers/definedcrowd/  
**Website:** https://www.definedcrowd.com/  
**APIs profiled:** 1

Defined.ai (formerly DefinedCrowd) is an AI training data platform and marketplace founded in 2015 by Daniela Braga, headquartered in Seattle with offices in Lisbon, Porto, and Tokyo. It provides ready-to-use datasets across speech, text, image, video, and multimodal, plus custom data collection, annotation, machine translation, conversational AI, LLM fine-tuning, and data and model evaluation services sourced from a global community of 1.6M+ vetted contributors across 150+ markets and 500+ languages, dialects, and locales. The Defined.ai Public API (v2.0) lets enterprise customers manage projects programmatically — create Mean Opinion Score and Pronunciation Validation projects, upload input units, configure supported languages, track project status and errors, manage jobs, retrieve deliverables, and subscribe to notifications. Data provenance and compliance are backed by ISO 27001, ISO 27701, ISO 42001, GDPR, and HIPAA.

## Kin Score — 38.6 / 100 (thin)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (-0.5 from 39.1).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 54.4 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 47.0 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

## Agent readiness — 25.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | partial |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (8)

- **Defined.ai (DefinedCrowd) Deliverables API** — The result file is created after the project is completed and is referred to as deliverables. The file contains contributor metadata for completed input units.
- **Defined.ai (DefinedCrowd) Input Units API** — Each input unit is a single component of work done by the contributors. There are several types of units – audio, text, and image. In a given project, all units should have the ...
- **Defined.ai (DefinedCrowd) Jobs API** — Jobs are how your data (input units) connects the project with our contributors. Each job has data, instructions, and customizable parameters, which then convert inputs to outpu...
- **Defined.ai (DefinedCrowd) Mean Opinion Score API** — Aggregate ratings on the "intelligibility" and "naturalness" of utterances.
- **Defined.ai (DefinedCrowd) Project Management API** — Informally, projects can be viewed as configurable packages that process sets of Input Units. The project’s template determines how the Input Units are processed. Projects can b...
- **Defined.ai (DefinedCrowd) Pronunciation Validation API** — Confirm audio meets pronunciation standards.
- **Defined.ai (DefinedCrowd) Subscriptions API** — Subscribe to automatic notifications for specific email addresses. Email notifications are sent for events that happen during the life cycle of the project. <small> By using thi...
- **Defined.ai (DefinedCrowd) Supported Languages API** — Several of the Workflow Templates offer the ability to set a language / country code. These configurations instruct Defined.ai to use our human intelligence Contributors that sp...

## MCP servers (1)

- **Defined.ai (DefinedCrowd) MCP Server**

## Agentic access (1)

- **Definedcrowd Agentic Access** — 29 operations · 14 acting

## Security (2)

- **Definedcrowd Authentication** — apiKey · 1 scheme
- **Definedcrowd Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, AI Training Data, Data Marketplace, Machine-Learning, Data Annotation, Speech Data, Natural Language Processing, Crowdsourcing, Artificial Intelligence

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/definedcrowd/). Scores are computed from the provider's own public artifacts under a published rubric.