Prolific

Prolific is a platform for high-quality human data collection, connecting researchers and AI/ML teams with a vetted pool of verified participants for online studies, surveys, and human-feedback tasks (preference tuning, safety evals, benchmarks, RLHF). Its public REST API (api.prolific.com, OpenAPI 3.1) automates the full workflow: create and cost studies, target participants with demographic filters and filter sets, launch and monitor recruitment, review and approve submissions, pay rewards and bonuses, message participants, run AI Task Builder batches, and receive HMAC-signed webhooks. Prolific also ships a Go CLI and an official Model Context Protocol server for agent-driven study workflows. Trusted by Google, Hugging Face, and academic and government researchers.

Prolific publishes 18 APIs on the APIs.io network, including aiTaskBuilder API, bonuses API, credentials API, and 15 more. Tagged areas include Company, Ai/Ml, Human Data, Research, and Participant Recruitment.

The Prolific catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Prolific’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub
55.2/100 developing ▬ flat Agent 69/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
18 APIs 1 MCP Servers
CompanyAi/MlHuman DataResearchParticipant RecruitmentSurveysHuman FeedbackRLHFData CollectionAPI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 55.2/100 · developing
Contract Quality 15.9 / 25
Developer Ergonomics 17.4 / 20
Commercial Clarity 6.8 / 20
Operational Transparency 5.1 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 69/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 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/prolific: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 18

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

Prolific aiTaskBuilder API

The aiTaskBuilder API from Prolific — 24 operation(s) for aitaskbuilder.

Prolific bonuses API

The bonuses API from Prolific — 2 operation(s) for bonuses.

Prolific credentials API

The credentials API from Prolific — 2 operation(s) for credentials.

Prolific filters API

The filters API from Prolific — 3 operation(s) for filters.

Prolific filterSets API

The filterSets API from Prolific — 5 operation(s) for filtersets.

Prolific invitations API

The invitations API from Prolific — 1 operation(s) for invitations.

Prolific messages API

The messages API from Prolific — 4 operation(s) for messages.

Prolific participantGroups API

The participantGroups API from Prolific — 3 operation(s) for participantgroups.

Prolific projects API

The projects API from Prolific — 2 operation(s) for projects.

Prolific rewardRecommendations API

The rewardRecommendations API from Prolific — 1 operation(s) for rewardrecommendations.

Prolific studies API

The studies API from Prolific — 18 operation(s) for studies.

Prolific submissionFeedbackUpload API

The submissionFeedbackUpload API from Prolific — 1 operation(s) for submissionfeedbackupload.

Prolific submissions API

The submissions API from Prolific — 5 operation(s) for submissions.

Prolific surveys API

The surveys API from Prolific — 5 operation(s) for surveys.

Prolific users API

The users API from Prolific — 2 operation(s) for users.

Prolific webhooks API

The webhooks API from Prolific — 5 operation(s) for webhooks.

Prolific wellKnownEndpoints API

The wellKnownEndpoints API from Prolific — 1 operation(s) for wellknownendpoints.

Prolific workspaces API

The workspaces API from Prolific — 3 operation(s) for workspaces.

Scroll for all 18

MCP Servers 1

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

prolific-mcp.yml

MCP SERVER

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Prolific Webhooks

ASYNCAPI

Security Posture 2

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

Prolific Authentication

apiKey · 1 scheme

SECURITY

Prolific Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Sandbox
Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference
 OpenAPI
OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 AgentSkill
AgentSkill
 WellKnown
WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Webhooks
Webhooks
 Conventions
Conventions
 Idempotency
Idempotency
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 3

Authentication, authorization, and security posture

Security
Security
 Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

Pricing
Pricing
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: prolific
name: Prolific
description: 'Prolific is a platform for high-quality human data collection, connecting researchers and AI/ML teams with a
  vetted pool of verified participants for online studies, surveys, and human-feedback tasks (preference tuning, safety evals,
  benchmarks, RLHF). Its public REST API (api.prolific.com, OpenAPI 3.1) automates the full workflow: create and cost studies,
  target participants with demographic filters and filter sets, launch and monitor recruitment, review and approve submissions,
  pay rewards and bonuses, message participants, run AI Task Builder batches, and receive HMAC-signed webhooks. Prolific also
  ships a Go CLI and an official Model Context Protocol server for agent-driven study workflows. Trusted by Google, Hugging
  Face, and academic and government researchers.'
url: https://raw.githubusercontent.com/api-evangelist/prolific/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- partech
x-tier: stub
x-tier-reason: portfolio-lead
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://www.prolific.com/favicon.ico
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Ai/Ml
- Human Data
- Research
- Participant Recruitment
- Surveys
- Human Feedback
- RLHF
- Data Collection
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: prolific:prolific-aitaskbuilder-api
  name: Prolific aiTaskBuilder API
  description: The aiTaskBuilder API from Prolific — 24 operation(s) for aitaskbuilder.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - aiTaskBuilder
  properties:
  - type: OpenAPI
    url: openapi/prolific-aitaskbuilder-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-bonuses-api
  name: Prolific bonuses API
  description: The bonuses API from Prolific — 2 operation(s) for bonuses.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - bonuses
  properties:
  - type: OpenAPI
    url: openapi/prolific-bonuses-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-credentials-api
  name: Prolific credentials API
  description: The credentials API from Prolific — 2 operation(s) for credentials.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - credentials
  properties:
  - type: OpenAPI
    url: openapi/prolific-credentials-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-filters-api
  name: Prolific filters API
  description: The filters API from Prolific — 3 operation(s) for filters.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - filters
  properties:
  - type: OpenAPI
    url: openapi/prolific-filters-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-filtersets-api
  name: Prolific filterSets API
  description: The filterSets API from Prolific — 5 operation(s) for filtersets.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - filterSets
  properties:
  - type: OpenAPI
    url: openapi/prolific-filtersets-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-invitations-api
  name: Prolific invitations API
  description: The invitations API from Prolific — 1 operation(s) for invitations.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - invitations
  properties:
  - type: OpenAPI
    url: openapi/prolific-invitations-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-messages-api
  name: Prolific messages API
  description: The messages API from Prolific — 4 operation(s) for messages.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - messages
  properties:
  - type: OpenAPI
    url: openapi/prolific-messages-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-participantgroups-api
  name: Prolific participantGroups API
  description: The participantGroups API from Prolific — 3 operation(s) for participantgroups.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - participantGroups
  properties:
  - type: OpenAPI
    url: openapi/prolific-participantgroups-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-projects-api
  name: Prolific projects API
  description: The projects API from Prolific — 2 operation(s) for projects.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - projects
  properties:
  - type: OpenAPI
    url: openapi/prolific-projects-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-rewardrecommendations-api
  name: Prolific rewardRecommendations API
  description: The rewardRecommendations API from Prolific — 1 operation(s) for rewardrecommendations.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - rewardRecommendations
  properties:
  - type: OpenAPI
    url: openapi/prolific-rewardrecommendations-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-studies-api
  name: Prolific studies API
  description: The studies API from Prolific — 18 operation(s) for studies.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - studies
  properties:
  - type: OpenAPI
    url: openapi/prolific-studies-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-submissionfeedbackupload-api
  name: Prolific submissionFeedbackUpload API
  description: The submissionFeedbackUpload API from Prolific — 1 operation(s) for submissionfeedbackupload.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - submissionFeedbackUpload
  properties:
  - type: OpenAPI
    url: openapi/prolific-submissionfeedbackupload-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-submissions-api
  name: Prolific submissions API
  description: The submissions API from Prolific — 5 operation(s) for submissions.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - submissions
  properties:
  - type: OpenAPI
    url: openapi/prolific-submissions-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-surveys-api
  name: Prolific surveys API
  description: The surveys API from Prolific — 5 operation(s) for surveys.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - surveys
  properties:
  - type: OpenAPI
    url: openapi/prolific-surveys-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-users-api
  name: Prolific users API
  description: The users API from Prolific — 2 operation(s) for users.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - users
  properties:
  - type: OpenAPI
    url: openapi/prolific-users-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-webhooks-api
  name: Prolific webhooks API
  description: The webhooks API from Prolific — 5 operation(s) for webhooks.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - webhooks
  properties:
  - type: OpenAPI
    url: openapi/prolific-webhooks-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-wellknownendpoints-api
  name: Prolific wellKnownEndpoints API
  description: The wellKnownEndpoints API from Prolific — 1 operation(s) for wellknownendpoints.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - wellKnownEndpoints
  properties:
  - type: OpenAPI
    url: openapi/prolific-wellknownendpoints-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
- aid: prolific:prolific-workspaces-api
  name: Prolific workspaces API
  description: The workspaces API from Prolific — 3 operation(s) for workspaces.
  humanURL: https://docs.prolific.com/documentation/get-started/overview
  baseURL: https://api.prolific.com
  tags:
  - workspaces
  properties:
  - type: OpenAPI
    url: openapi/prolific-workspaces-api-openapi.yml
  - type: Authentication
    url: authentication/prolific-authentication.yml
  - type: ErrorCatalog
    url: errors/prolific-problem-types.yml
  - type: DataModel
    url: data-model/prolific-data-model.yml
common:
- type: Website
  url: https://www.prolific.com/
- type: DeveloperPortal
  url: https://docs.prolific.com/documentation/get-started/overview
- type: Documentation
  url: https://docs.prolific.com/
- type: APIReference
  url: https://docs.prolific.com/api-reference.md
- type: GettingStarted
  url: https://docs.prolific.com/documentation/get-started/your-first-data-collection
- type: Support
  url: https://researcher-help.prolific.com/en
- type: Blog
  url: https://www.prolific.com/blog
- type: GitHubOrganization
  url: https://github.com/prolific-oss
- type: Pricing
  url: https://www.prolific.com/pricing
- type: SignUp
  url: https://app.prolific.com/register
- type: PrivacyPolicy
  url: https://www.prolific.com/privacy-and-legal
- type: Security
  url: https://www.prolific.com/prolific-security-overview
- type: StatusPage
  url: https://status.prolific.com
- type: OpenAPI
  url: openapi/prolific-openapi-original.yml
- type: Authentication
  url: authentication/prolific-authentication.yml
- type: LLMsTxt
  url: llms/prolific-llms.txt
- type: Packages
  url: packages/prolific-packages.yml
- type: SDKs
  url: packages/prolific-packages.yml
- type: CLI
  url: cli/prolific-cli.yml
- type: MCPServer
  url: mcp/prolific-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: WellKnown
  url: well-known/prolific-well-known.yml
- type: Webhooks
  url: asyncapi/prolific-webhooks.yml
- type: Conventions
  url: conventions/prolific-conventions.yml
- type: Idempotency
  url: conventions/prolific-conventions.yml
- type: ErrorCatalog
  url: errors/prolific-problem-types.yml
- type: Lifecycle
  url: lifecycle/prolific-lifecycle.yml
- type: Conformance
  url: conformance/prolific-conformance.yml
- type: DataModel
  url: data-model/prolific-data-model.yml
- type: Sandbox
  url: sandbox/prolific-sandbox.yml
- type: DomainSecurity
  url: security/prolific-domain-security.yml
- type: Overlay
  url: overlays/prolific-openapi-overlay.yaml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 16
  pass: local-v1