Astroclaw

Astroclaw provides daily horoscopes tailored for autonomous AI agents, delivering deterministic celestial alignment data that influences agent behavior. Each zodiac sign receives a short, playful forecast published shortly after 00:00 UTC. The service is free, requires no API key or account, and offers simple HTTP endpoints such as /api/sign to retrieve a sign based on birthdate or name, as well as per‑sign text files like /today/aries.txt. Astroclaw’s mission is to give AI agents a cosmic compass, enriching their interactions with personality‑driven context while remaining lightweight and easy to integrate.

Astroclaw publishes 4 API contracts indexed on the APIs.io network, including Forecasts API, Sign API, Signs.json API, and 1 more. Tagged areas include Astrology, Artificial Intelligence, Agents, Horoscopes, and Data.

The Astroclaw catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Astroclaw’s developer surface includes documentation, API reference, getting-started guide, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.3/100 thin ▬ flat Agent 32/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessOpen

1 published contract 1 MCP Servers 2 Agent Skills

Astrology Artificial Intelligence Agents Horoscopes Data

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 28.3/100 · thin

Contract Quality 11.8 / 21

Developer Ergonomics 3.5 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.4 / 11

Contract Governance 2.2 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 20.7 — up to +15.9 composite points
Operational Transparency scores 3.9 — up to +12.5 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/astroclaw-xyz/apis.yml: open an issue on github.com/api-evangelist/astroclaw-xyz to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 4

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

Astroclaw Forecasts API

The Forecasts API from Astroclaw — 5 operation(s) for forecasts.

Astroclaw Sign API

The Sign API from Astroclaw — 1 operation(s) for sign.

Astroclaw Signs.json API

The Signs.json API from Astroclaw — 1 operation(s) for signs.json.

Astroclaw Webhooks API

The Webhooks API from Astroclaw — 3 operation(s) for webhooks.

MCP Servers 1

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

Astroclaw MCP Server

Remote MCP server at www.astroclaw.xyz.

MCP SERVER

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

find-sign

AGENT SKILL

get-horoscope

AGENT SKILL

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Astroclaw Xyz Context

3 classes · 11 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Astroclaw API Rules

38 rules · 36 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Astroclaw Xyz Overlay

0 actions · update

UNRECORDED

JSON Schema 4

Standalone JSON Schema definitions for this provider's data models.

Forecast

7 properties

JSON SCHEMA

SignName

0 properties

JSON SCHEMA

TodayForecast

8 properties

JSON SCHEMA

TodayForecasts

5 properties

JSON SCHEMA

Security Posture 2

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

Astroclaw Xyz Authentication

0 schemes

SECURITY

Astroclaw Xyz Domain Security

TLSv1.3 · HSTS

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Astroclaw Xyz Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Astroclaw Xyz Agentic Access

20 operations · 6 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Webhooks

Scroll for all 7

Build 1

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: astroclaw-xyz
name: Astroclaw
description: Astroclaw provides daily horoscopes tailored for autonomous AI agents, delivering deterministic celestial alignment
  data that influences agent behavior. Each zodiac sign receives a short, playful forecast published shortly after 00:00 UTC.
  The service is free, requires no API key or account, and offers simple HTTP endpoints such as /api/sign to retrieve a sign
  based on birthdate or name, as well as per‑sign text files like /today/aries.txt. Astroclaw’s mission is to give AI agents
  a cosmic compass, enriching their interactions with personality‑driven context while remaining lightweight and easy to integrate.
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.astroclaw.xyz/images/astroclaw-og.png
url: https://artifacts.apis.io/astroclaw-xyz/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-01 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-01'
modified: '2026-11-01'
tags:
- Astrology
- Artificial Intelligence
- Agents
- Horoscopes
- Data
tags_raw:
- Astrology
- AI
- Agents
- Horoscopes
- Data
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/astroclaw-xyz-overlay.yaml
- type: AgenticAccess
  url: agentic-access/astroclaw-xyz-agentic-access.yml
- type: Spectral
  url: rules/astroclaw-xyz-rules.yml
- type: JSONLD
  url: json-ld/astroclaw-xyz-context.jsonld
- type: Vocabulary
  url: vocabulary/astroclaw-xyz-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/astroclaw-xyz-data-model.yml
- type: ErrorCatalog
  url: errors/astroclaw-xyz-problem-types.yml
- type: Conformance
  url: conformance/astroclaw-xyz-conformance.yml
- type: LLMsTxt
  url: llms/astroclaw-xyz-llms.txt
- type: ToolCrosswalk
  url: mcp/astroclaw-xyz-tool-crosswalk.yml
- type: MCPServer
  url: mcp/astroclaw-xyz-mcp.yml
- type: WellKnown
  url: well-known/astroclaw-xyz-well-known.yml
- type: Hosts
  url: hosts/astroclaw-xyz-hosts.yml
- type: Vendors
  url: vendors/astroclaw-xyz-vendors.yml
- type: Webhooks
  url: https://www.astroclaw.xyz/webhooks/
- type: DomainSecurity
  url: security/astroclaw-xyz-domain-security.yml
- type: Website
  url: https://astroclaw.xyz/
- type: Documentation
  url: https://www.astroclaw.xyz/skill.md
- type: APIReference
  url: https://www.astroclaw.xyz/.well-known/openapi.yaml
- type: GettingStarted
  url: https://www.astroclaw.xyz/skill.md
apis:
- aid: astroclaw-xyz:astroclaw-xyz-forecasts-api
  name: Astroclaw Forecasts API
  description: The Forecasts API from Astroclaw — 5 operation(s) for forecasts.
  humanURL: https://www.astroclaw.xyz/
  baseURL: https://www.astroclaw.xyz
  tags:
  - Forecast
  tags_raw:
  - Forecasts
  properties:
  - type: OpenAPI
    url: openapi/astroclaw-xyz-forecasts-api-openapi.yml
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-forecast-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-today-forecasts-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-today-forecast-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-sign-name-schema.json
- aid: astroclaw-xyz:astroclaw-xyz-sign-api
  name: Astroclaw Sign API
  description: The Sign API from Astroclaw — 1 operation(s) for sign.
  humanURL: https://www.astroclaw.xyz/
  baseURL: https://www.astroclaw.xyz
  tags:
  - Sign
  properties:
  - type: OpenAPI
    url: openapi/astroclaw-xyz-sign-api-openapi.yml
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-forecast-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-today-forecasts-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-today-forecast-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-sign-name-schema.json
- aid: astroclaw-xyz:astroclaw-xyz-signs-json-api
  name: Astroclaw Signs.json API
  description: The Signs.json API from Astroclaw — 1 operation(s) for signs.json.
  humanURL: https://www.astroclaw.xyz/
  baseURL: https://www.astroclaw.xyz
  tags:
  - Signs.json
  properties:
  - type: OpenAPI
    url: openapi/astroclaw-xyz-signs-json-api-openapi.yml
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-forecast-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-today-forecasts-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-today-forecast-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-sign-name-schema.json
- aid: astroclaw-xyz:astroclaw-xyz-webhooks-api
  name: Astroclaw Webhooks API
  description: The Webhooks API from Astroclaw — 3 operation(s) for webhooks.
  humanURL: https://www.astroclaw.xyz/
  baseURL: https://www.astroclaw.xyz
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/astroclaw-xyz-webhooks-api-openapi.yml
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-forecast-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-today-forecasts-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-today-forecast-schema.json
  - type: JSONSchema
    url: json-schema/astroclaw-xyz-sign-name-schema.json
x-enrichment:
  date: '2026-11-01'
  status: enriched
  artifacts_added: 40
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Astroclaw API — frequently asked questions

Does Astroclaw have an API?

Yes. APIs.io lists 4 APIs from Astroclaw, including Astroclaw Forecasts API, Astroclaw Sign API and Astroclaw Signs.json API, and 1 more.

Is there an OpenAPI specification for the Astroclaw API?

Yes. APIs.io indexes 4 OpenAPI specifications for Astroclaw, each linked for download from this page.

How do I authenticate with the Astroclaw API?

Astroclaw uses bearer-token authentication (0 schemes). The details are profiled on APIs.io as Astroclaw Xyz Authentication.

Does Astroclaw have an MCP server?

Yes. APIs.io lists 1 MCP server for Astroclaw: Remote MCP server at www.astroclaw.xyz.

Is the Astroclaw API ready for AI agents?

Astroclaw has a Kin Score of 28.3 out of 100 (thin) and an Agent Readiness score of 32.2 (agent-ready), scored by API Evangelist on 2026-11-06.

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