GrantSonar

GrantSonar provides an AI‑powered grant‑making platform that helps public sector and nonprofit organizations discover, apply for, and manage grant opportunities. The service offers tools for searching grants across federal, state, and private programs, automating application workflows, and tracking award status. It supports a wide range of sectors including transportation, infrastructure, community development, health, education, and the arts, aiming to simplify the complex grant landscape for municipalities, schools, nonprofits, and other public entities.

GrantSonar is listed with 1 API on the APIs.io network. Tagged areas include Artificial Intelligence, Grants, Public Sector, Non-Profit, and Infrastructure.

GrantSonar’s developer surface includes pricing, engineering blog, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.6/100 emerging Agent 6/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

1 API

Artificial Intelligence Grants Public Sector Non-Profit Infrastructure Education

Kin Score

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

Composite quality — 25.6/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.3 / 17

Access Clarity 10.5 / 17

Operational Transparency 1.0 / 11

Contract Governance 0.0 / 10

Discoverability 5.9 / 9

Regulatory Posture 2.7 / 15

Agent readiness — 6/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 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 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 Education & Research 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) 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 →

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 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 25.5 — up to +14.9 composite points Ask about this →
Contract Governance scores 0.0 — up to +12.0 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/grantsonar-com/apis.yml: open an issue on github.com/api-evangelist/grantsonar-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 1

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)

APIs 1

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

GrantSonar API

Developer portal for GrantSonar providing API documentation and MCP access.

GrantSonar API pricing

Prices published by GrantSonar, read 2026-11-10 from grantsonar.com/pricing.

Plan	Price
Free	$0
Pro	$89/mo
Team	$179/mo
Done‑for‑you service	$1,950 founding rate (10 slots) · standard $2,450
Enterprise & specialized	Contact us — hello@grantsonar.com

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

GrantSonar Plans Pricing

5 plans

PLANS

Security Posture 2

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

GrantSonar Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

GrantSonar Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

DeveloperPortal

DeveloperPortal

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Build 1

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Access & Security 4

Authentication, authorization, and security posture

Security

Security

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

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: grantsonar-com
name: GrantSonar
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  probe_state: unreadable
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://grantsonar.com/opengraph-image
description: GrantSonar provides an AI‑powered grant‑making platform that helps public sector and nonprofit organizations
  discover, apply for, and manage grant opportunities. The service offers tools for searching grants across federal, state,
  and private programs, automating application workflows, and tracking award status. It supports a wide range of sectors including
  transportation, infrastructure, community development, health, education, and the arts, aiming to simplify the complex grant
  landscape for municipalities, schools, nonprofits, and other public entities.
url: https://artifacts.apis.io/grantsonar-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-10 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-10'
modified: '2026-11-10'
tags:
- Artificial Intelligence
- Grants
- Public Sector
- Non-Profit
- Infrastructure
- Education
tags_raw:
- AI
- Grants
- PublicSector
- Nonprofit
- Infrastructure
- Education
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/grantsonar-com-plans-pricing.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Security
  url: security/grantsonar-com-vulnerability-disclosure.yml
- type: LLMsTxt
  url: llms/grantsonar-com-llms.txt
- type: SecurityTxt
  url: well-known/grantsonar-com-security.txt
- type: WellKnown
  url: well-known/grantsonar-com-well-known.yml
- type: Hosts
  url: hosts/grantsonar-com-hosts.yml
- type: Vendors
  url: vendors/grantsonar-com-vendors.yml
- type: TermsOfService
  url: https://grantsonar.com/terms
- type: SDKs
  url: https://grantsonar.com/for/libraries
- type: PrivacyPolicy
  url: https://grantsonar.com/privacy
- type: Pricing
  url: https://grantsonar.com/pricing
- type: Newsroom
  url: https://grantsonar.com/press
- type: Login
  url: https://grantsonar.com/auth/login
- type: DeveloperPortal
  url: https://grantsonar.com/developers
- type: Blog
  url: https://grantsonar.com/blog
- type: VulnerabilityDisclosure
  url: security/grantsonar-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/grantsonar-com-domain-security.yml
- type: Website
  url: https://grantsonar.com/
apis:
- name: GrantSonar API
  description: Developer portal for GrantSonar providing API documentation and MCP access.
  humanURL: https://grantsonar.com/developers
  baseURL: null
  aid: grantsonar-com:grantsonar-api
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Developer portal pages are rendered via JavaScript, preventing machine‑readable spec discovery.
  evidence:
  - url: https://grantsonar.com/developers
    status: 200
  checked: '2026-11-10'
x-enrichment:
  date: '2026-11-10'
  status: enriched
  artifacts_added: 15
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

GrantSonar API — frequently asked questions

Does GrantSonar have an API?

Yes. APIs.io lists 1 API from GrantSonar, including GrantSonar API.

How much does the GrantSonar API cost?

GrantSonar publishes its prices; its Free plan is $0 as of 2026-11-10. APIs.io lists 5 pricing plans for GrantSonar, with each plan's price, limits and inclusions under Pricing on this page.

Is the GrantSonar API ready for AI agents?

GrantSonar has a Kin Score of 25.6 out of 100 (emerging) and an Agent Readiness score of 6.3 (agent-aware), scored by API Evangelist on 2026-11-13.

Work with this as data

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MCP server

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Tools for providers

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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.

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