FormulaSignal

FormulaSignal provides a supplement record and monitoring service that tracks label changes, alerts users to formula updates, and maintains a personal Locker of supplement histories. Users can monitor products for changes, view detailed label histories, and receive notifications, helping them stay informed about ingredient adjustments and dosage variations.

FormulaSignal publishes 8 API contracts indexed on the APIs.io network, including Category API, Context API, Ledger API, and 5 more. Tagged areas include Health, Supplements, Monitoring, Consumer App, and Nutrition.

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

FormulaSignal’s developer surface includes changelog, authentication, support, documentation, getting-started guide, API reference, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

49.4/100 developing Agent 40/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

1 published contract 2 Agent Skills

Health Supplements Monitoring Consumer App Nutrition

Kin Score

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

Composite quality — 49.4/100 · developing

Contract Quality 14.3 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 7.6 / 17

Operational Transparency 3.9 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.2 / 15

Agent readiness — 40/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 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 0 / 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 6 / 6

Protected Resource Metadata 5 / 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 Health 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/formulasignal-com/"><img src="https://apis.io/badge/formulasignal-com/card.svg" alt="FormulaSignal on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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 →
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 →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

4 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 44.7 — up to +11.1 composite points Ask about this →
Developer Ergonomics scores 47.0 — up to +10.6 composite points Ask about this →
Contract Governance scores 22.0 — up to +9.4 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/formulasignal-com/apis.yml: open an issue on github.com/api-evangelist/formulasignal-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 →

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.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

FormulaSignal Category API

Bounded category movement.

FormulaSignal Context API

Research and regulatory context for declared ingredients.

FormulaSignal Ledger API

Category Ledger editions. Requires the ledger:read scope.

FormulaSignal Meta API

Self-description: version, coverage, liveness.

FormulaSignal Products API

Canonical identity, current state, history, economics.

FormulaSignal Record API

Ask one bounded question of the Record.

FormulaSignal Signals API

Confirmed, reviewed changes and the release feed.

FormulaSignal Watch API

One bound account's watchlist. Requires watch:manage.

Scroll for all 8

Agent Skills 2

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

formulasignal-com-get-context

AGENT SKILL

formulasignal-com-resolve-and-fetch-product

AGENT SKILL

FormulaSignal API pricing

Prices published by FormulaSignal, read 2026-11-08 from formulasignal.com/pro.

Plan	Price
Annual	$29.99/year
Monthly	$3.99/month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

FormulaSignal Plans Pricing

2 plans

PLANS

Semantic Vocabularies 1

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

Formulasignal Com Context

12 classes · 72 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.

FormulaSignal API Rules

70 rules · 64 error-severity 5 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

FormulaSignal Authentication

2 schemes

SECURITY

FormulaSignal Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

FormulaSignal Agentic Access

19 operations · 4 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Lifecycle

ErrorCatalog

Conformance

Scroll for all 7

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 5

Status, limits, changes, and where to get help

ChangeLog

Deprecation

Support

StatusPage

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

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: formulasignal-com
name: FormulaSignal
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://formulasignal.com/link-card.png
description: FormulaSignal provides a supplement record and monitoring service that tracks label changes, alerts users to
  formula updates, and maintains a personal Locker of supplement histories. Users can monitor products for changes, view detailed
  label histories, and receive notifications, helping them stay informed about ingredient adjustments and dosage variations.
url: https://artifacts.apis.io/formulasignal-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-08 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-08'
modified: '2026-11-08'
tags:
- Health
- Supplements
- Monitoring
- Consumer App
- Nutrition
tags_raw:
- Health
- Supplements
- Monitoring
- ConsumerApp
- Nutrition
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/formulasignal-com-agentic-access.yml
- type: Plans
  url: plans/formulasignal-com-plans-pricing.yml
- type: Spectral
  url: rules/formulasignal-com-rules.yml
- type: JSONLD
  url: json-ld/formulasignal-com-context.jsonld
- type: Vocabulary
  url: vocabulary/formulasignal-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/formulasignal-com-data-model.yml
- type: ChangeLog
  url: changelog/formulasignal-com-changelog.yml
- type: Authentication
  url: authentication/formulasignal-com-authentication.yml
- type: Deprecation
  url: lifecycle/formulasignal-com-lifecycle.yml
- type: Lifecycle
  url: lifecycle/formulasignal-com-lifecycle.yml
- type: ErrorCatalog
  url: errors/formulasignal-com-problem-types.yml
- type: Conformance
  url: conformance/formulasignal-com-conformance.yml
- type: LLMsTxt
  url: llms/formulasignal-com-llms.txt
- type: WellKnown
  url: well-known/formulasignal-com-well-known.yml
- type: Hosts
  url: hosts/formulasignal-com-hosts.yml
- type: Vendors
  url: vendors/formulasignal-com-vendors.yml
- type: TermsOfService
  url: https://formulasignal.com/terms
- type: Support
  url: https://formulasignal.com/support
- type: StatusPage
  url: https://formulasignal.com/status
- type: PrivacyPolicy
  url: https://formulasignal.com/privacy
- type: Login
  url: https://formulasignal.com/pro/signin
- type: Documentation
  url: https://formulasignal.com/guides
- type: ChangeLog
  url: https://formulasignal.com/developers/changelog
- type: GettingStarted
  url: https://formulasignal.com/developers
- type: APIReference
  url: https://formulasignal.com/developers/reference
- type: DomainSecurity
  url: security/formulasignal-com-domain-security.yml
- type: Website
  url: https://formulasignal.com/
apis:
- aid: formulasignal-com:formulasignal-com-category-api
  name: FormulaSignal Category API
  description: Bounded category movement.
  humanURL: https://formulasignal.com/developers/reference
  baseURL: https://formulasignal.com
  tags:
  - Category
  tags_raw:
  - category
  properties:
  - type: OpenAPI
    url: openapi/formulasignal-com-category-api-openapi.yml
- aid: formulasignal-com:formulasignal-com-context-api
  name: FormulaSignal Context API
  description: Research and regulatory context for declared ingredients.
  humanURL: https://formulasignal.com/developers/reference
  baseURL: https://formulasignal.com
  tags:
  - Context
  tags_raw:
  - context
  properties:
  - type: OpenAPI
    url: openapi/formulasignal-com-context-api-openapi.yml
- aid: formulasignal-com:formulasignal-com-ledger-api
  name: FormulaSignal Ledger API
  description: Category Ledger editions. Requires the ledger:read scope.
  humanURL: https://formulasignal.com/developers/reference
  baseURL: https://formulasignal.com
  tags:
  - Ledger
  tags_raw:
  - ledger
  properties:
  - type: OpenAPI
    url: openapi/formulasignal-com-ledger-api-openapi.yml
- aid: formulasignal-com:formulasignal-com-meta-api
  name: FormulaSignal Meta API
  description: 'Self-description: version, coverage, liveness.'
  humanURL: https://formulasignal.com/developers/reference
  baseURL: https://formulasignal.com
  tags:
  - Meta
  tags_raw:
  - meta
  properties:
  - type: OpenAPI
    url: openapi/formulasignal-com-meta-api-openapi.yml
- aid: formulasignal-com:formulasignal-com-products-api
  name: FormulaSignal Products API
  description: Canonical identity, current state, history, economics.
  humanURL: https://formulasignal.com/developers/reference
  baseURL: https://formulasignal.com
  tags:
  - Product
  tags_raw:
  - products
  properties:
  - type: OpenAPI
    url: openapi/formulasignal-com-products-api-openapi.yml
- aid: formulasignal-com:formulasignal-com-record-api
  name: FormulaSignal Record API
  description: Ask one bounded question of the Record.
  humanURL: https://formulasignal.com/developers/reference
  baseURL: https://formulasignal.com
  tags:
  - Record
  tags_raw:
  - record
  properties:
  - type: OpenAPI
    url: openapi/formulasignal-com-record-api-openapi.yml
- aid: formulasignal-com:formulasignal-com-signals-api
  name: FormulaSignal Signals API
  description: Confirmed, reviewed changes and the release feed.
  humanURL: https://formulasignal.com/developers/reference
  baseURL: https://formulasignal.com
  tags:
  - Signals
  tags_raw:
  - signals
  properties:
  - type: OpenAPI
    url: openapi/formulasignal-com-signals-api-openapi.yml
- aid: formulasignal-com:formulasignal-com-watch-api
  name: FormulaSignal Watch API
  description: One bound account's watchlist. Requires watch:manage.
  humanURL: https://formulasignal.com/developers/reference
  baseURL: https://formulasignal.com
  tags:
  - Watch
  tags_raw:
  - watch
  properties:
  - type: OpenAPI
    url: openapi/formulasignal-com-watch-api-openapi.yml
x-enrichment:
  date: '2026-11-08'
  status: enriched
  artifacts_added: 31
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

FormulaSignal API — frequently asked questions

Does FormulaSignal have an API?

Yes. APIs.io lists 8 APIs from FormulaSignal, including FormulaSignal Category API, FormulaSignal Context API and FormulaSignal Ledger API, and 5 more.

Is there an OpenAPI specification for the FormulaSignal API?

Yes. APIs.io indexes 8 OpenAPI specifications for FormulaSignal, each linked for download from this page.

How do I authenticate with the FormulaSignal API?

FormulaSignal documents its authentication (2 schemes). The details are profiled on APIs.io as FormulaSignal Authentication.

How much does the FormulaSignal API cost?

FormulaSignal publishes its prices; its Annual plan is $29.99/year as of 2026-11-08. APIs.io lists 2 pricing plans for FormulaSignal, with each plan's price, limits and inclusions under Pricing on this page.

Is the FormulaSignal API ready for AI agents?

FormulaSignal has a Kin Score of 49.4 out of 100 (developing) and an Agent Readiness score of 39.6 (agent-ready), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/formulasignal-com"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/formulasignal-com/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/formulasignal-com/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.