ProofDraw

Provably-fair random selection REST API that seals entry lists with SHA-256 commitments bound to future drand (League of Entropy) randomness rounds, producing publicly verifiable draw receipts with client-side open-source verification. A draw is created, entries are added as opaque ticket ids, then sealed against a chosen future beacon round on the quicknet (3s) or classic (30s) chain; the canonical list file is hashed, mirrored to a public GitHub repository, and anchored with OpenTimestamps, so any entrant can re-derive the winner in their own browser from public sources alone. Serves giveaways, raffles and sweepstakes, non-profit draws, audit sample selection and task allocation, with HMAC-signed webhooks and bearer API-key authentication.

ProofDraw publishes 5 APIs on the APIs.io network, including Account API, Auth API, Draws API, and 2 more. Tagged areas include Randomness, Provably Fair, drand, Verifiable Randomness, and Cryptography.

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

ProofDraw’s developer surface includes documentation, API reference, support, signup flow, authentication, sandbox, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.8/100 thin ▬ flat Agent 33/100 agent ready Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

2 APIs

RandomnessProvably FairdrandVerifiable RandomnessCryptographyrafflegiveawaySweepstakes Lottery Verification Webhook REST API

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 34.8/100 · thin

Contract Quality 13.4 / 23

Developer Ergonomics 3.7 / 18

Access Clarity 5.0 / 18

Operational Transparency 1.2 / 12

Contract Governance 0.5 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 2.2 / 10

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/proofdraw: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 5

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

ProofDraw Account API

The Account API from ProofDraw — 2 operation(s) for account.

ProofDraw Auth API

The Auth API from ProofDraw — 2 operation(s) for auth.

ProofDraw Draws API

The Draws API from ProofDraw — 6 operation(s) for draws.

ProofDraw System API

The System API from ProofDraw — 1 operation(s) for system.

ProofDraw Verification API

Public, unauthenticated artifacts used to verify a draw.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

ProofDraw API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Proofdraw Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Proofdraw Rate Limits

0 limits

RATE LIMITS

Event Specifications 1

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

Proofdraw Webhooks

ASYNCAPI

Security Posture 3

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

Proofdraw Authentication

http · 1 scheme

SECURITY

Proofdraw Domain Security

TLSv1.3 · DMARC

SECURITY

Proofdraw Vulnerability Disclosure

Hackerone · security.txt · contact published

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Webhooks

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

SourceCode

SourceCode

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

License

TermsOfService

PrivacyPolicy

Plans

Company 3

The organization behind the API

Website

Website

Twitter

Twitter

LinkedIn

Other 2

Properties that don't map to a standard resource type

Overlay

Overlay

Whitepaper

Whitepaper

Source (apis.yml)

name: ProofDraw
description: Provably-fair random selection REST API that seals entry lists with SHA-256 commitments bound to future drand
  (League of Entropy) randomness rounds, producing publicly verifiable draw receipts with client-side open-source verification.
  A draw is created, entries are added as opaque ticket ids, then sealed against a chosen future beacon round on the quicknet
  (3s) or classic (30s) chain; the canonical list file is hashed, mirrored to a public GitHub repository, and anchored with
  OpenTimestamps, so any entrant can re-derive the winner in their own browser from public sources alone. Serves giveaways,
  raffles and sweepstakes, non-profit draws, audit sample selection and task allocation, with HMAC-signed webhooks and bearer
  API-key authentication.
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  - pricing
  - repository-unlicensed
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  probe_state: covered
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://proofdraw.com/og.png
url: https://raw.githubusercontent.com/api-evangelist/proofdraw/refs/heads/main/apis.yml
created: '2026-07-13'
modified: '2026-08-11'
specificationVersion: '0.23'
tags:
- Randomness
- Provably Fair
- drand
- Verifiable Randomness
- Cryptography
- raffle
- giveaway
- Sweepstakes
- Lottery
- Verification
- Webhook
- REST API
tags_raw:
- randomness
- provably-fair
- drand
- verifiable-randomness
- cryptography
- raffle
- giveaway
- sweepstakes
- lottery
- verification
- webhooks
- rest-api
apis:
- aid: proofdraw:proofdraw-account-api
  name: ProofDraw Account API
  description: The Account API from ProofDraw — 2 operation(s) for account.
  humanURL: https://proofdraw.com/api
  baseURL: https://proofdraw.com/api/v1
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/proofdraw-account-api-openapi.yml
  - type: Documentation
    url: https://proofdraw.com/api
  - type: APIReference
    url: https://proofdraw.com/api
- aid: proofdraw:proofdraw-auth-api
  name: ProofDraw Auth API
  description: The Auth API from ProofDraw — 2 operation(s) for auth.
  humanURL: https://proofdraw.com/api
  baseURL: https://proofdraw.com/api/v1
  tags:
  - Authentication
  tags_raw:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/proofdraw-auth-api-openapi.yml
  - type: Documentation
    url: https://proofdraw.com/api
  - type: APIReference
    url: https://proofdraw.com/api
- aid: proofdraw:proofdraw-draws-api
  name: ProofDraw Draws API
  description: The Draws API from ProofDraw — 6 operation(s) for draws.
  humanURL: https://proofdraw.com/api
  baseURL: https://proofdraw.com/api/v1
  tags:
  - Draws
  properties:
  - type: OpenAPI
    url: openapi/proofdraw-draws-api-openapi.yml
  - type: Documentation
    url: https://proofdraw.com/api
  - type: APIReference
    url: https://proofdraw.com/api
- aid: proofdraw:proofdraw-system-api
  name: ProofDraw System API
  description: The System API from ProofDraw — 1 operation(s) for system.
  humanURL: https://proofdraw.com/api
  baseURL: https://proofdraw.com/api/v1
  tags:
  - System
  properties:
  - type: OpenAPI
    url: openapi/proofdraw-system-api-openapi.yml
  - type: Documentation
    url: https://proofdraw.com/api
  - type: APIReference
    url: https://proofdraw.com/api
- aid: proofdraw:proofdraw-verification-api
  name: ProofDraw Verification API
  description: Public, unauthenticated artifacts used to verify a draw.
  humanURL: https://proofdraw.com/api
  baseURL: https://proofdraw.com/api/v1
  tags:
  - Verification
  properties:
  - type: OpenAPI
    url: openapi/proofdraw-verification-api-openapi.yml
  - type: Documentation
    url: https://proofdraw.com/api
  - type: APIReference
    url: https://proofdraw.com/api
maintainers:
- FN: ProofDraw
  email: hello@proofdraw.com
  url: https://proofdraw.com/
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 95
  at: '2026-07-13T18:06:16.367Z'
x-enrichment:
  date: '2026-08-11'
  status: enriched
  artifacts_added: 23
  pass: local-v1
x-coverage:
  state: covered
  reason: null
  detail: Live OpenAPI 3.0.3 harvested from https://proofdraw.com/openapi.json (200) and the full API reference read from
    https://proofdraw.com/api (200); no wall was hit. The agent surfaces are genuinely absent — every /.well-known/ path,
    /llms.txt and /mcp return 404.
  checked: '2026-08-11'
common:
- type: License
  name: MIT
  url: https://github.com/proofdraw/verifier/blob/main/LICENSE
- type: Overlay
  url: overlays/proofdraw-api-overlay.yaml
- type: Website
  url: https://proofdraw.com/
- type: DeveloperPortal
  url: https://proofdraw.com/api
- type: Documentation
  url: https://proofdraw.com/api
- type: APIReference
  url: https://proofdraw.com/api
- type: Support
  url: https://proofdraw.com/contact
- type: GitHubOrganization
  url: https://github.com/proofdraw
- type: SignUp
  url: https://proofdraw.com/register
- type: Login
  url: https://proofdraw.com/login
- type: TermsOfService
  url: https://proofdraw.com/terms
- type: PrivacyPolicy
  url: https://proofdraw.com/privacy
- type: Whitepaper
  url: https://proofdraw.com/whitepaper
- type: Twitter
  url: https://x.com/proofdraw
- type: LinkedIn
  url: https://linkedin.com/company/proofdraw
- type: SourceCode
  url: https://github.com/proofdraw/verifier
- type: DomainSecurity
  url: security/proofdraw-domain-security.yml
- type: Authentication
  url: authentication/proofdraw-authentication.yml
- type: Conventions
  url: conventions/proofdraw-conventions.yml
- type: ErrorCatalog
  url: errors/proofdraw-problem-types.yml
- type: Lifecycle
  url: lifecycle/proofdraw-lifecycle.yml
- type: Conformance
  url: conformance/proofdraw-conformance.yml
- type: DataModel
  url: data-model/proofdraw-data-model.yml
- type: Webhooks
  url: asyncapi/proofdraw-webhooks.yml
- type: Sandbox
  url: sandbox/proofdraw-sandbox.yml
- type: Plans
  url: plans/proofdraw-plans-pricing.yml
- type: RateLimits
  url: rate-limits/proofdraw-rate-limits.yml
- type: LLMsTxt
  url: llms/proofdraw-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: VulnerabilityDisclosure
  url: security/proofdraw-vulnerability-disclosure.yml
- type: Security
  url: https://proofdraw.com/contact

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