FillTrust

FillTrust is an AI security questionnaire automation service that drafts answers to vendor security questionnaires (CAIQ, SIG, ISO and similar) from a company's own SOC 2 report, ISO certificate, policies, pen test summaries and answer library. Every drafted answer cites the source passage it came from, and answers the evidence does not support are left blank rather than invented. The product also offers a free hosted Trust Center, a browser extension, and a read-only MCP server that exposes the FillTrust guidance corpus to assistants over HTTP.

FillTrust is listed with 1 API on the APIs.io network. Tagged areas include Security Questionnaires, Vendor Risk, Compliance Automation, Trust Center, and SOC 2.

FillTrust’s developer surface includes documentation, engineering blog, pricing, support, signup flow, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.0/100 thin Agent 6/100 agent aware Heartbeat 94/100 alive Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

1 API 1 MCP Servers

Security Questionnaires Vendor Risk Compliance Automation Trust Center SOC 2CAIQMCPAI Drafting

Kin Score

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

Composite quality — 32.0/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 12.7 / 17

Operational Transparency 1.0 / 11

Contract Governance 1.9 / 10

Discoverability 6.9 / 9

Regulatory Posture 4.4 / 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 7 / 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 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):

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 16.7 — up to +16.7 composite points Ask about this →
Operational Transparency scores 9.5 — up to +11.8 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/filltrust-com/apis.yml: open an issue on github.com/api-evangelist/filltrust-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.

FillTrust MCP Server

Read-only Model Context Protocol server that exposes the FillTrust security-questionnaire guidance corpus to LLM assistants over Streamable HTTP. Five documented tools: search_q...

MCP Servers 1

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

FillTrust MCP Server

MCP SERVER

FillTrust API pricing

Prices published by FillTrust.

Plan	Price
Starter	$19/mo
Pro	$49/mo
Enterprise	Custom
One questionnaire	$29 once

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

FillTrust Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

FillTrust Rate Limits

0 limits

RATE LIMITS

Security Posture 4

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

FillTrust Authentication

1 scheme

SECURITY

FillTrust Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

FillTrust Vulnerability Disclosure

security.txt · contact published

SECURITY

FillTrust Trust Center

SOC 2

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Components

Conventions

Lifecycle

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

IntegrationEdges

IntegrationEdges

Access & Security 7

Authentication, authorization, and security posture

Compliance

SecurityTxt

SecurityTxt

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Security

Security

Scroll for all 7

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

PrivacyPolicy

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: filltrust-com
name: FillTrust
description: FillTrust is an AI security questionnaire automation service that drafts answers to vendor security questionnaires
  (CAIQ, SIG, ISO and similar) from a company's own SOC 2 report, ISO certificate, policies, pen test summaries and answer
  library. Every drafted answer cites the source passage it came from, and answers the evidence does not support are left
  blank rather than invented. The product also offers a free hosted Trust Center, a browser extension, and a read-only MCP
  server that exposes the FillTrust guidance corpus to assistants over HTTP.
url: https://artifacts.apis.io/filltrust-com/apis.yml
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-13'
  method: derived
image: https://www.filltrust.com/favicon.ico
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-07 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-07'
modified: '2026-11-07'
tags:
- Security Questionnaires
- Vendor Risk
- Compliance Automation
- Trust Center
- SOC 2
- CAIQ
- MCP
- AI Drafting
tags_raw:
- Security Questionnaires
- Vendor Risk
- Compliance Automation
- Trust Center
- SOC 2
- CAIQ
- Model Context Protocol
- AI Drafting
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/filltrust-com-plans-pricing.yml
- type: Components
  url: components/filltrust-com-components.yml
- type: Conventions
  url: conventions/filltrust-com-conventions.yml
- type: Compliance
  url: https://www.filltrust.com/trust
- type: Lifecycle
  url: lifecycle/filltrust-com-lifecycle.yml
- type: Conformance
  url: conformance/filltrust-com-conformance.yml
- type: LLMsTxt
  url: llms/filltrust-com-llms.txt
- type: SecurityTxt
  url: well-known/filltrust-com-security.txt
- type: SecurityTxt
  url: well-known/filltrust-com-filltrust-security.txt
- type: WellKnown
  url: well-known/filltrust-com-well-known.yml
- type: Hosts
  url: hosts/filltrust-com-hosts.yml
- type: IntegrationEdges
  url: integrations/filltrust-com-integration-edges.yml
- type: Vendors
  url: vendors/filltrust-com-vendors.yml
- type: Documentation
  url: https://dev.filltrust.com/
- type: TrustCenter
  url: security/filltrust-com-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/filltrust-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/filltrust-com-domain-security.yml
- type: Website
  url: https://www.filltrust.com/
- type: Blog
  url: https://www.filltrust.com/blog
- type: Pricing
  url: https://www.filltrust.com/pricing
- type: PrivacyPolicy
  url: https://www.filltrust.com/privacy
- type: TermsOfService
  url: https://www.filltrust.com/terms
- type: Security
  url: https://www.filltrust.com/security
- type: Support
  url: https://www.filltrust.com/support
- type: SignUp
  url: https://www.filltrust.com/onboarding
- type: Login
  url: https://www.filltrust.com/login
apis:
- name: FillTrust MCP Server
  description: 'Read-only Model Context Protocol server that exposes the FillTrust security-questionnaire guidance corpus
    to LLM assistants over Streamable HTTP. Five documented tools: search_questions, get_question, list_standards, get_filltrust_posture
    and get_questionnaire_statistics. tools/list and initialize responded anonymously to a JSON-RPC probe on 2026-11-07; serverInfo
    returns name "filltrust", title "FillTrust security questionnaire corpus", version 1.0.0 and websiteUrl https://www.filltrust.com,
    confirming ownership.'
  humanURL: https://www.filltrust.com/
  baseURL: https://www.filltrust.com/api/mcp
  properties:
  - type: MCPServer
    url: https://www.filltrust.com/api/mcp
  - type: LLMsTxt
    url: https://www.filltrust.com/llms.txt
  aid: filltrust-com:filltrust-mcp-server
x-enrichment:
  date: '2026-11-07'
  status: enriched
  artifacts_added: 25
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

FillTrust API — frequently asked questions

Does FillTrust have an API?

Yes. APIs.io lists 1 API from FillTrust, including FillTrust MCP Server.

How do I authenticate with the FillTrust API?

FillTrust documents its authentication (1 scheme). The details are profiled on APIs.io as FillTrust Authentication.

How much does the FillTrust API cost?

FillTrust publishes its prices; its Starter plan is $19/mo as of 2026-11-07. APIs.io lists 4 pricing plans for FillTrust, with each plan's price, limits and inclusions under Pricing on this page.

Does FillTrust have an MCP server?

Yes. APIs.io lists 1 MCP server for FillTrust.

Is the FillTrust API ready for AI agents?

FillTrust has a Kin Score of 32.0 out of 100 (thin) and an Agent Readiness score of 6.0 (agent-aware), 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.

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