HillSignal

HillSignal provides public-records intelligence by aggregating bills, executive orders, contracts, lobbying, foreign agents, PAC money and trades to show what the U.S. government is doing and who is positioned. The platform offers a free plan with real‑time signal feed and AI assistant, and paid tiers for full history, alerts, and a Pro terminal.

HillSignal is listed with 2 APIs on the APIs.io network. Tagged areas include HillSignal, Data Intelligence, Government, and Finance.

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

HillSignal’s developer surface includes engineering blog and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

22.1/100 emerging Agent 17/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

2 APIs

HillSignalData Intelligence Government Finance

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 22.1/100 · emerging

Contract Quality 4.3 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 4.7 / 17

Operational Transparency 0.0 / 11

Contract Governance 3.6 / 10

Discoverability 4.3 / 9

Regulatory Posture 1.9 / 15

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 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 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 Government & Public Sector 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 20.1 — up to +20.0 composite points Ask about this →
Developer Ergonomics scores 11.9 — up to +17.6 composite points Ask about this →
Access Clarity scores 27.7 — up to +14.5 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/hillsignal-com/apis.yml: open an issue on github.com/api-evangelist/hillsignal-com 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 →

APIs 2

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

HillSignal API

Public records intelligence API providing access to bills, executive orders, contracts, lobbying, PAC money and trades.

HillSignal API

HillSignal API as documented publicly: 10 operations. Contract generated from the documentation by API Evangelist (2026-11-11); not the provider's own document.

Semantic Vocabularies 1

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

Hillsignal Com Context

2 classes · 5 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

HillSignal API Rules

38 rules · 36 error-severity 1 warn-severity 1 info-severity

SPECTRAL

JSON Schema 2

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

GetApiMcpResponse

4 properties

JSON SCHEMA

GetApiV1Response

1 properties

JSON SCHEMA

Security Posture 1

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

HillSignal Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

DeveloperPortal

DeveloperPortal

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

Newsroom

Newsroom

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: hillsignal-com
name: HillSignal
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: unreadable
  source:
  - security
  generated: '2026-11-13'
  method: derived
image: https://www.hillsignal.com/og-image.png
description: HillSignal provides public-records intelligence by aggregating bills, executive orders, contracts, lobbying,
  foreign agents, PAC money and trades to show what the U.S. government is doing and who is positioned. The platform offers
  a free plan with real‑time signal feed and AI assistant, and paid tiers for full history, alerts, and a Pro terminal.
url: https://artifacts.apis.io/hillsignal-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-11 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-11'
modified: '2026-11-11'
tags:
- HillSignal
- Data Intelligence
- Government
- Finance
tags_raw:
- HillSignal
- Data Intelligence
- Government
- Finance
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/hillsignal-com-rules.yml
- type: JSONLD
  url: json-ld/hillsignal-com-context.jsonld
- type: Vocabulary
  url: vocabulary/hillsignal-com-vocabulary.yml
- type: DataModel
  url: data-model/hillsignal-com-data-model.yml
- type: Conformance
  url: conformance/hillsignal-com-conformance.yml
- type: LLMsTxt
  url: llms/hillsignal-com-llms.txt
- type: Hosts
  url: hosts/hillsignal-com-hosts.yml
- type: Vendors
  url: vendors/hillsignal-com-vendors.yml
- type: TermsOfService
  url: https://www.hillsignal.com/terms
- type: PrivacyPolicy
  url: https://www.hillsignal.com/privacy
- type: Newsroom
  url: https://www.hillsignal.com/press
- type: Login
  url: https://www.hillsignal.com/login
- type: DeveloperPortal
  url: https://www.hillsignal.com/developers
- type: Blog
  url: https://www.hillsignal.com/blog
- type: DomainSecurity
  url: security/hillsignal-com-domain-security.yml
- type: Website
  url: https://hillsignal.com/
apis:
- name: HillSignal API
  description: Public records intelligence API providing access to bills, executive orders, contracts, lobbying, PAC money
    and trades.
  humanURL: https://www.hillsignal.com/developers
  baseURL: null
  aid: hillsignal-com:hillsignal-api
- aid: hillsignal-com:hillsignal-com-api
  name: HillSignal API
  description: 'HillSignal API as documented publicly: 10 operations. Contract generated from the documentation by API Evangelist
    (2026-11-11); not the provider''s own document.'
  humanURL: https://www.hillsignal.com/api/wire
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/hillsignal-com-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/hillsignal-com-get-api-mcp-response-schema.json
  - type: JSONSchema
    url: json-schema/hillsignal-com-get-api-v1-response-schema.json
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: The provider offers a developer portal but no OpenAPI, AsyncAPI, GraphQL, gRPC, or WSDL contracts are publicly available.
  evidence:
  - url: https://www.hillsignal.com/developers
    status: 200
  checked: '2026-11-11'
x-enrichment:
  date: '2026-11-11'
  status: enriched
  artifacts_added: 18
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

HillSignal API — frequently asked questions

Does HillSignal have an API?

Yes. APIs.io lists 2 APIs from HillSignal, including HillSignal API and HillSignal API.

Is there an OpenAPI specification for the HillSignal API?

Yes. APIs.io indexes 1 OpenAPI specification for HillSignal, each linked for download from this page.

How do I authenticate with the HillSignal API?

HillSignal uses bearer-token authentication.

Is the HillSignal API ready for AI agents?

HillSignal has a Kin Score of 22.1 out of 100 (emerging) and an Agent Readiness score of 17.3 (agent-aware), scored by API Evangelist on 2026-11-13.

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