Passbase

Passbase was a developer-first identity verification (KYC) platform founded in Berlin and San Francisco that let companies verify users in seconds through facial comparison, liveness detection, and authenticity checks on government-issued IDs from 190+ countries. It shipped mobile and web client SDKs plus a server-side Verifications API (v2) for reading verified identities, their resources and data points, and project settings, with webhooks for verification lifecycle events. Passbase was acquired by Parallel Markets in March 2023; api.passbase.com and docs.passbase.com are no longer live, and this API Evangelist profile captures the last-published API surface reconstructed from the company's official OpenAPI-generated SDKs. Backed by Cowboy Ventures and Seedcamp.

Passbase publishes 2 API contracts indexed on the APIs.io network: Identity API and Project API. Tagged areas include Company, Security, Identity Verification, KYC, and Biometrics.

The Passbase catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Passbase’s developer surface includes authentication and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.6/100 thin ▬ flat Agent 31/100 agent ready Heartbeat 0/100 dormant library Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 2 Agent Skills

Company Security Identity Verification KYC Biometrics Authentication Identity Compliance

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 28.6/100 · thin

Contract Quality 11.8 / 21

Developer Ergonomics 3.5 / 17

Access Clarity 0.0 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 2.4 / 15

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 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 AI & Biometrics 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
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)

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 0.0 — up to +20.0 composite points
Developer Ergonomics scores 20.8 — up to +15.8 composite points
Operational Transparency scores 10.5 — up to +11.6 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/passbase/apis.yml: open an issue on github.com/api-evangelist/passbase 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Biometrics Testing (biometric recognition vendors, identity verification depth)	distribution	28.7	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 2

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

Passbase Identity API

Access verified identities, their resources and resource files.

Passbase Project API

Read project settings and verification configuration.

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Passbase Verifications Identity API

OPEN COLLECTION

Passbase Verifications Identity Project API

OPEN COLLECTION

Agent Skills 2

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

Fetch a verified identity and its resources

AGENT SKILL

Read project verification settings

AGENT SKILL

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Passbase Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Passbase API Rules

58 rules · 56 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Passbase Verification Overlay

2 actions · update · passbase-verification-openapi.yml

DERIVED

Security Posture 2

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

Passbase Authentication

apiKey · 1 scheme

SECURITY

Passbase Domain Security

TLSv1.3 · HSTS

SECURITY

Agentic Access 1

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

Passbase Agentic Access

6 operations

6 operations · 0 acting

AGENTIC

Resources

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgentSkill

LLMsTxt

AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Conformance

Lifecycle

DataModel

Webhooks

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: passbase
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - url: https://www.passbase.com
    status: 302
    note: declared website redirects to https://parallelmarkets.com/?utm_source=passbase.com — a different registrable domain
      (passbase.com -> parallelmarkets.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/passbase.png
name: Passbase
description: Passbase was a developer-first identity verification (KYC) platform founded in Berlin and San Francisco that
  let companies verify users in seconds through facial comparison, liveness detection, and authenticity checks on government-issued
  IDs from 190+ countries. It shipped mobile and web client SDKs plus a server-side Verifications API (v2) for reading verified
  identities, their resources and data points, and project settings, with webhooks for verification lifecycle events. Passbase
  was acquired by Parallel Markets in March 2023; api.passbase.com and docs.passbase.com are no longer live, and this API
  Evangelist profile captures the last-published API surface reconstructed from the company's official OpenAPI-generated SDKs.
  Backed by Cowboy Ventures and Seedcamp.
url: https://raw.githubusercontent.com/api-evangelist/passbase/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- cowboy-ventures
- seedcamp
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-successor: Parallel Markets
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Security
- Identity Verification
- KYC
- Biometrics
- Authentication
- Identity
- Compliance
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: passbase:passbase-identity-api
  name: Passbase Identity API
  description: Access verified identities, their resources and resource files.
  humanURL: https://github.com/passbase/passbase-php
  baseURL: https://api.passbase.com/verification/v2
  tags:
  - Identity
  properties:
  - type: OpenAPI
    url: openapi/passbase-identity-api-openapi.yml
- aid: passbase:passbase-project-api
  name: Passbase Project API
  description: Read project settings and verification configuration.
  humanURL: https://github.com/passbase/passbase-php
  baseURL: https://api.passbase.com/verification/v2
  tags:
  - Project
  properties:
  - type: OpenAPI
    url: openapi/passbase-project-api-openapi.yml
common:
- type: Overlay
  url: overlays/passbase-verification-overlay.yaml
- type: Website
  url: https://www.passbase.com
- type: GitHubOrganization
  url: https://github.com/passbase
- type: Packages
  url: packages/passbase-packages.yml
- type: SDKs
  url: packages/passbase-packages.yml
- type: Authentication
  url: authentication/passbase-authentication.yml
- type: X-MCPServerCandidate
  url: mcp/passbase-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/passbase-llms.txt
- type: Conventions
  url: conventions/passbase-conventions.yml
- type: ErrorCatalog
  url: errors/passbase-problem-types.yml
- type: Conformance
  url: conformance/passbase-conformance.yml
- type: Lifecycle
  url: lifecycle/passbase-lifecycle.yml
- type: DataModel
  url: data-model/passbase-data-model.yml
- type: Webhooks
  url: asyncapi/passbase-webhooks.yml
- type: DomainSecurity
  url: security/passbase-domain-security.yml
- type: AgenticAccess
  url: agentic-access/passbase-agentic-access.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 16
  pass: local-v1

Passbase API — frequently asked questions

Does Passbase have an API?

Yes. APIs.io lists 2 APIs from Passbase, including Passbase Identity API and Passbase Project API.

Is there an OpenAPI specification for the Passbase API?

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

How do I authenticate with the Passbase API?

Passbase uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Passbase Authentication.

Is the Passbase API ready for AI agents?

Passbase has a Kin Score of 28.6 out of 100 (thin) and an Agent Readiness score of 31.4 (agent-ready), scored by API Evangelist on 2026-11-06.

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