# ProofDraw

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

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.

## Kin Score — 35.9 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 35.9).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 61.0 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 20.8 |
| Commercial Clarity | 27.6 |
| Access Clarity | 27.6 |

## Agent readiness — 42.9 (agent-ready)

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

## APIs (1)

- **ProofDraw API** — Provably-fair random selection REST API (v1) covering draw lifecycle, account, health, and public verification artifacts. HMAC-signed webhooks. Bearer API-key auth.

## Security (3)

- **Proofdraw Authentication** — http · 1 scheme
- **Proofdraw Domain Security** — TLSv1.3 · DMARC
- **Proofdraw Vulnerability Disclosure** — Hackerone · security.txt · contact published

## Plans (1)

- **Proofdraw Plans Pricing**

## Tags

Randomness, Provably Fair, drand, verifiable-randomness, Cryptography, raffle, giveaway, Sweepstakes, Lottery, Verification, Webhook, REST API

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