Proof Random API (Kepler Ops)

Proof Random API (Kepler Ops) provides a free public randomness service by relaying the drand quicknet beacon. It offers a simple endpoint to derive reproducible integers from the latest beacon using a user‑supplied nonce. The API returns the sampled value, beacon round, signature digest verification, and indicates that no BLS verification or x402 billing is performed. This service is intended for non‑adversarial use cases such as testing, demos, or low‑stakes applications.

Proof Random API (Kepler Ops) publishes 1 API contract indexed on the APIs.io network: Random API. Tagged areas include Company, Randomness, Public APIs, Drand, and Free Service.

The Proof Random API (Kepler Ops) catalog on APIs.io includes 1 Spectral governance ruleset.

Proof Random API (Kepler Ops)’s developer surface includes API reference and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.0/100 emerging ▬ flat Agent 16/100 agent aware Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

1 published contract

Company Randomness Public APIsDrandFree Service

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 18.0/100 · emerging

Contract Quality 8.7 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 4.1 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 16/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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<a href="https://apis.io/providers/proof-random-api/"><img src="https://apis.io/badge/proof-random-api/card.svg" alt="Proof Random API (Kepler Ops) on APIs.io — Kin Score by API Evangelist"></a>

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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/proof-random-api: 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 1

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

Proof Random API (Kepler Ops) Random API

The Random API from Proof Random API (Kepler Ops) — 1 operation(s) for random.

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Proof Random API (Kepler Ops) API Rules

9 rules · 7 errors 1 warnings 1 info

SPECTRAL

Security Posture 1

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

Proof Random Api Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

llms.txt

llms.txt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

ErrorCatalog

ErrorCatalog

Conformance

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: proof-random-api
name: Proof Random API (Kepler Ops)
description: Proof Random API (Kepler Ops) provides a free public randomness service by relaying the drand quicknet beacon.
  It offers a simple endpoint to derive reproducible integers from the latest beacon using a user‑supplied nonce. The API
  returns the sampled value, beacon round, signature digest verification, and indicates that no BLS verification or x402 billing
  is performed. This service is intended for non‑adversarial use cases such as testing, demos, or low‑stakes applications.
url: https://raw.githubusercontent.com/api-evangelist/proof-random-api/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-09-27'
modified: '2026-09-27'
tags:
- Company
- Randomness
- Public APIs
- Drand
- Free Service
tags_raw:
- Company
- Randomness
- Public API
- Drand
- Free Service
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://proof-random-api.pn-26f.workers.dev/logo.png
common:
- type: Spectral
  url: rules/proof-random-api-rules.yml
- type: ErrorCatalog
  url: errors/proof-random-api-problem-types.yml
- type: Conformance
  url: conformance/proof-random-api-conformance.yml
- type: Hosts
  url: hosts/proof-random-api-hosts.yml
- type: Vendors
  url: vendors/proof-random-api-vendors.yml
- type: DomainSecurity
  url: security/proof-random-api-domain-security.yml
- type: Website
  url: https://proof-random-api.pn-26f.workers.dev/
- type: APIReference
  url: https://proof-random-api.pn-26f.workers.dev/openapi.json
- type: llms.txt
  url: https://proof-random-api.pn-26f.workers.dev/llms.txt
apis:
- aid: proof-random-api:proof-random-api-random-api
  name: Proof Random API (Kepler Ops) Random API
  description: The Random API from Proof Random API (Kepler Ops) — 1 operation(s) for random.
  tags:
  - Random
  properties:
  - type: OpenAPI
    url: openapi/proof-random-api-random-api-openapi.yml
x-enrichment:
  date: '2026-09-27'
  status: enriched
  artifacts_added: 9
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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