factline-dev

Factline provides a unified API for financial teams and AI agents to verify suppliers and payees against official records. It offers KYB, invoice validation, IBAN, VAT, sanctions, and PEP checks in a single call, enabling compliance and risk management. Pricing starts from $0.001 per check, with a free trial available. The service aims to streamline due diligence and reduce fraud in payments.

factline-dev publishes 2 API contracts indexed on the APIs.io network: Free API and Paid (x402) API. Tagged areas include Company, Finance, Compliance, KYB, and API.

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

factline-dev’s developer surface includes signup flow, authentication, documentation, API reference, getting-started guide, changelog, pricing, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

48.4/100 developing Agent 29/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract

Company Finance Compliance KYBAPI

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 48.4/100 · developing

Contract Quality 11.9 / 21

Developer Ergonomics 6.9 / 17

Access Clarity 8.9 / 17

Operational Transparency 2.9 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 5.3 / 15

Agent readiness — 29/100 · 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 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 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 0 / 5

Distinct Operations 3 / 3

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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

8 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 40.5 — up to +11.9 composite points
Contract Quality scores 56.2 — up to +11.0 composite points
Operational Transparency scores 26.3 — up to +9.6 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/factline-dev/apis.yml: open an issue on github.com/api-evangelist/factline-dev 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.

factline-dev Free API

The Free API from factline-dev — 52 operation(s) for free.

factline-dev Paid (x402) API

The Paid (x402) API from factline-dev — 43 operation(s) for paid (x402).

Semantic Vocabularies 1

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

Factline Dev Context

1 classes · 3 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

factline-dev API Rules

16 rules · 14 errors 1 warnings 1 info

SPECTRAL

Security Posture 3

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

Factline Dev Authentication

http · 1 scheme

SECURITY

Factline Dev Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Factline Dev Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Factline Dev Agentic Access

95 operations

95 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 6

Authentication, authorization, and security posture

Security

SecurityTxt

TrustCenter

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Changelog

Changelog

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Pricing

Pricing

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: factline-dev
name: factline-dev
image: https://factline.dev/og.png
description: Factline provides a unified API for financial teams and AI agents to verify suppliers and payees against official
  records. It offers KYB, invoice validation, IBAN, VAT, sanctions, and PEP checks in a single call, enabling compliance and
  risk management. Pricing starts from $0.001 per check, with a free trial available. The service aims to streamline due diligence
  and reduce fraud in payments.
url: https://artifacts.apis.io/factline-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
tags:
- Company
- Finance
- Compliance
- KYB
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/factline-dev-agentic-access.yml
- type: Spectral
  url: rules/factline-dev-rules.yml
- type: JSONLD
  url: json-ld/factline-dev-context.jsonld
- type: Vocabulary
  url: vocabulary/factline-dev-vocabulary.yml
- type: DataModel
  url: data-model/factline-dev-data-model.yml
- type: Security
  url: https://factline.dev/trust
- type: ErrorCatalog
  url: errors/factline-dev-problem-types.yml
- type: Conformance
  url: conformance/factline-dev-conformance.yml
- type: LLMsTxt
  url: llms/factline-dev-llms.txt
- type: AgentCard
  url: a2a/factline-dev-a2a.yml
- type: SecurityTxt
  url: well-known/factline-dev-security.txt
- type: WellKnown
  url: well-known/factline-dev-well-known.yml
- type: Hosts
  url: hosts/factline-dev-hosts.yml
- type: Vendors
  url: vendors/factline-dev-vendors.yml
- type: TrustCenter
  url: https://factline.dev/trust
- type: SignUp
  url: https://factline.dev/registerplicht-makelaars
- type: Authentication
  url: authentication/factline-dev-authentication.yml
- type: VulnerabilityDisclosure
  url: security/factline-dev-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/factline-dev-domain-security.yml
- type: Website
  url: https://factline.dev/
- type: Documentation
  url: https://factline.dev/docs
- type: APIReference
  url: https://factline.dev/docs
- type: GettingStarted
  url: https://factline.dev/business#trial
- type: TermsOfService
  url: https://factline.dev/terms
- type: PrivacyPolicy
  url: https://factline.dev/privacy
- type: Changelog
  url: https://factline.dev/changelog
- type: StatusPage
  url: https://factline.dev/status
- type: Pricing
  url: https://factline.dev/#prices
apis:
- aid: factline-dev:factline-dev-free-api
  name: factline-dev Free API
  description: The Free API from factline-dev — 52 operation(s) for free.
  humanURL: https://factline.dev/docs
  baseURL: https://factline.dev
  tags:
  - Free
  properties:
  - type: OpenAPI
    url: openapi/factline-dev-free-api-openapi.yml
- aid: factline-dev:factline-dev-paid-x402-api
  name: factline-dev Paid (x402) API
  description: The Paid (x402) API from factline-dev — 43 operation(s) for paid (x402).
  humanURL: https://factline.dev/docs
  baseURL: https://factline.dev
  tags:
  - Paid (x402)
  properties:
  - type: OpenAPI
    url: openapi/factline-dev-paid-x402-api-openapi.yml
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 27
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

factline-dev API — frequently asked questions

Does factline-dev have an API?

Yes. APIs.io lists 2 APIs from factline-dev, including factline-dev Free API and factline-dev Paid (x402) API.

Is there an OpenAPI specification for the factline-dev API?

Yes. APIs.io indexes 2 OpenAPI specifications for factline-dev, each linked for download from this page.

How do I authenticate with the factline-dev API?

factline-dev uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Factline Dev Authentication.

Is the factline-dev API ready for AI agents?

factline-dev has a Kin Score of 48.4 out of 100 (developing) and an Agent Readiness score of 29.3 (agent-ready), scored by API Evangelist on 2026-10-31.

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