Airbase

Airbase is a modern spend management platform for finance teams that combines accounts-payable (AP) automation and bill pay, guided procurement and purchase orders, corporate cards, and expense reimbursements on a single system with real-time general-ledger sync. Airbase Inc. was acquired by Paylocity in a ~$325M deal announced September 4, 2024 and completed October 1, 2024, and now operates as "Airbase by Paylocity," extending Paylocity's HCM suite into the office of the CFO. Airbase exposes a developer platform at developer.airbase.io (REST API reference, OpenAPI/Swagger, Postman and Insomnia collections, a webhooks management API, an OAuth playground, and a sandbox) used to build custom connections for systems not covered by the pre-built integrations. API access is account-gated - credentials are generated inside the customer's Airbase/Paylocity tenant rather than through open self-serve signup - so the logical APIs below are honestly modeled from the documented product surface and developer portal, and the exact endpoint paths and base URL are not publicly reproduced here (endpointsModeled).

Airbase is listed with 9 APIs on the APIs.io network. Tagged areas include Spend Management, Accounts Payable, Bill Pay, Procurement, and Corporate Cards.

Airbase’s developer surface includes documentation and 6 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

6.7/100 minimal ▬ flat Agent 1/100 human only Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

9 APIs

Spend Management Accounts Payable Bill Pay Procurement Corporate Cards Expense Management FintechPaylocityGated API

Kin Score

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

Composite quality — 6.7/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 0.7 / 17

Operational Transparency 0.5 / 11

Contract Governance 0.0 / 10

Discoverability 5.3 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 1/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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 Payments 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 →
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 →
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 →

12 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 →
Access Clarity scores 4.3 — up to +19.1 composite points Ask about this →
Developer Ergonomics scores 9.5 — up to +18.1 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.

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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/airbase/apis.yml: open an issue on github.com/api-evangelist/airbase 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
Procurement and B2B Buying (source-to-pay suites, spend management)	undeclared	-	-	-

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.

APIs 9

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

Airbase Bills & AP Automation API

Programmatically create, list, retrieve, and update bills and vendor invoices flowing through Airbase's AP automation - including bill line items, approval state, payment status...

Airbase Purchase Requests & Orders API

Create and track guided purchase requests and purchase orders, including intake details, line items, vendor and GL coding, budget checks, and the approval milestones a request t...

Airbase Vendors API

Manage the vendor/supplier master record - create, list, retrieve, and update vendors, their payment details, tax and onboarding information, and the relationships that bills, p...

Airbase Corporate Cards API

Access Airbase corporate and virtual card programs - list cards, card holders, spend limits and controls, and their associated policies - to reconcile card spend against budgets...

Airbase Transactions API

Pull unified transaction and spend data across cards, bills, and reimbursements - amounts, merchants, dates, GL coding, and reconciliation status - for reporting, analytics, and...

Airbase Expense Reimbursements API

Create and track employee expense reimbursements and out-of-pocket claims - receipts, line items, approval state, and payout status - as part of Airbase's expense management wor...

Airbase Approvals API

Inspect and act on the multi-step approval workflows that gate purchase requests, bills, cards, and reimbursements - approvers, policy rules, current state, and milestone transi...

Airbase GL & Accounting Sync API

Read and push general-ledger coding and accounting records so spend stays in sync with the ERP/GL. Airbase promotes a REST API specifically for building custom ERP/GL connection...

Airbase Webhooks Management API

Register and manage webhook subscriptions so external systems receive Airbase events - for example a purchase request being approved or a workflow transitioning through a milest...

Scroll for all 9

Airbase API pricing

Not yet checked against Airbase's own pricing page. Compiled by API Evangelist on 2026-07-03 from www.airbase.com/; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Airbase Platform (Quote-Based) enterprise	—
Developer / Sandbox Access free	—

Plan details, limits and sources →

Rate limits

REST API Requests: not published requests
Webhook Delivery: not published events

Compiled by API Evangelist, not yet checked against Airbase's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Airbase Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Airbase Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Airbase Finops

FINOPS

Security Posture 1

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

Airbase Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: airbase
url: https://raw.githubusercontent.com/api-evangelist/airbase/refs/heads/main/apis.yml
name: Airbase
kind: company
description: Airbase is a modern spend management platform for finance teams that combines accounts-payable (AP) automation
  and bill pay, guided procurement and purchase orders, corporate cards, and expense reimbursements on a single system with
  real-time general-ledger sync. Airbase Inc. was acquired by Paylocity in a ~$325M deal announced September 4, 2024 and completed
  October 1, 2024, and now operates as "Airbase by Paylocity," extending Paylocity's HCM suite into the office of the CFO.
  Airbase exposes a developer platform at developer.airbase.io (REST API reference, OpenAPI/Swagger, Postman and Insomnia
  collections, a webhooks management API, an OAuth playground, and a sandbox) used to build custom connections for systems
  not covered by the pre-built integrations. API access is account-gated - credentials are generated inside the customer's
  Airbase/Paylocity tenant rather than through open self-serve signup - so the logical APIs below are honestly modeled from
  the documented product surface and developer portal, and the exact endpoint paths and base URL are not publicly reproduced
  here (endpointsModeled).
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/airbase.png
x-docs-platform: stoplight
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-09-17
tags:
- Spend Management
- Accounts Payable
- Bill Pay
- Procurement
- Corporate Cards
- Expense Management
- Fintech
- Paylocity
- Gated API
tags_raw:
- Spend Management
- Accounts Payable
- Bill Pay
- Procurement
- Corporate Cards
- Expense Management
- FinTech
- Paylocity
- Gated API
created: '2026-07-03'
modified: '2026-07-03'
specificationVersion: '0.23'
apis:
- aid: airbase:airbase-bills-ap-api
  name: Airbase Bills & AP Automation API
  tags:
  - Bills
  - Accounts Payable
  - Bill Pay
  - Invoices
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.airbase.io/
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  - url: https://www.airbase.com/
    type: Website
  description: Programmatically create, list, retrieve, and update bills and vendor invoices flowing through Airbase's AP
    automation - including bill line items, approval state, payment status, and payment method - to automate pre-approval,
    payment, and accounting workflows. Endpoints are honestly modeled from the documented AP/bill-pay product surface; access
    is account-gated (endpointsModeled).
- aid: airbase:airbase-purchase-orders-api
  name: Airbase Purchase Requests & Orders API
  tags:
  - Purchase Requests
  - Purchase Orders
  - Procurement
  - Intake
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.airbase.io/
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  - url: https://www.airbase.com/
    type: Website
  description: Create and track guided purchase requests and purchase orders, including intake details, line items, vendor
    and GL coding, budget checks, and the approval milestones a request transitions through. Airbase emits webhook events
    such as "purchase request approved" as requests move through their workflow. Endpoints modeled from the documented procurement
    surface; account-gated (endpointsModeled).
- aid: airbase:airbase-vendors-api
  name: Airbase Vendors API
  tags:
  - Vendors
  - Suppliers
  - Master Data
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.airbase.io/
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  - url: https://vendors.airbase.io/
    type: Website
  description: Manage the vendor/supplier master record - create, list, retrieve, and update vendors, their payment details,
    tax and onboarding information, and the relationships that bills, purchase orders, and payments are made against. Airbase
    also runs a separate vendor portal at vendors.airbase.io. Endpoints modeled from the documented vendor-management surface;
    account-gated (endpointsModeled).
- aid: airbase:airbase-cards-api
  name: Airbase Corporate Cards API
  tags:
  - Corporate Cards
  - Virtual Cards
  - Card Programs
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.airbase.io/
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  - url: https://www.airbase.com/
    type: Website
  description: Access Airbase corporate and virtual card programs - list cards, card holders, spend limits and controls, and
    their associated policies - to reconcile card spend against budgets and the general ledger. Endpoints modeled from the
    documented corporate-card product surface; account-gated (endpointsModeled).
- aid: airbase:airbase-transactions-api
  name: Airbase Transactions API
  tags:
  - Transaction
  - Spend Data
  - Reconciliation
  tags_raw:
  - Transactions
  - Spend Data
  - Reconciliation
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.airbase.io/
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  - url: https://www.airbase.com/
    type: Website
  description: Pull unified transaction and spend data across cards, bills, and reimbursements - amounts, merchants, dates,
    GL coding, and reconciliation status - for reporting, analytics, and closing the books. Endpoints modeled from the documented
    spend-data surface; account-gated (endpointsModeled).
- aid: airbase:airbase-reimbursements-api
  name: Airbase Expense Reimbursements API
  tags:
  - Expenses
  - Reimbursement
  - Employee Spend
  tags_raw:
  - Expenses
  - Reimbursements
  - Employee Spend
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.airbase.io/
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  - url: https://www.airbase.com/
    type: Website
  description: Create and track employee expense reimbursements and out-of-pocket claims - receipts, line items, approval
    state, and payout status - as part of Airbase's expense management workflows. Endpoints modeled from the documented reimbursement
    surface; account-gated (endpointsModeled).
- aid: airbase:airbase-approvals-api
  name: Airbase Approvals API
  tags:
  - Approvals
  - Workflows
  - Policy
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.airbase.io/
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  - url: https://www.airbase.com/
    type: Website
  description: Inspect and act on the multi-step approval workflows that gate purchase requests, bills, cards, and reimbursements
    - approvers, policy rules, current state, and milestone transitions. Approval milestone changes are also delivered as
    webhook events. Endpoints modeled from the documented approvals surface; account-gated (endpointsModeled).
- aid: airbase:airbase-gl-accounting-sync-api
  name: Airbase GL & Accounting Sync API
  tags:
  - General Ledger
  - Accounting
  - ERP Sync
  - GL Coding
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.airbase.com/sheets/erp-integration-api
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  - url: https://www.airbase.com/integrations-overview
    type: Website
  description: Read and push general-ledger coding and accounting records so spend stays in sync with the ERP/GL. Airbase
    promotes a REST API specifically for building custom ERP/GL connections for systems not on its pre-built integration list.
    Endpoints modeled from the documented ERP-integration/GL-sync surface; account-gated (endpointsModeled).
- aid: airbase:airbase-webhooks-api
  name: Airbase Webhooks Management API
  tags:
  - Webhook
  - Event
  - Subscription
  tags_raw:
  - Webhooks
  - Events
  - Subscriptions
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.airbase.io/
  properties:
  - url: https://developer.airbase.io/
    type: Documentation
  description: Register and manage webhook subscriptions so external systems receive Airbase events - for example a purchase
    request being approved or a workflow transitioning through a milestone - as JSON payloads (id, object, type, created_date,
    data). A webhooks management API is documented on the Airbase developer portal. Endpoints modeled from the documented
    webhook surface; account-gated (endpointsModeled).
common:
- type: DomainSecurity
  url: security/airbase-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/airbase
- type: Website
  url: https://www.airbase.com/
- type: Documentation
  url: https://developer.airbase.io/
- type: Plans
  url: plans/airbase-plans-pricing.yml
- type: RateLimits
  url: rate-limits/airbase-rate-limits.yml
- type: FinOps
  url: finops/airbase-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Airbase API — frequently asked questions

Does Airbase have an API?

Yes. APIs.io lists 9 APIs from Airbase, including Airbase Bills & AP Automation API, Airbase Purchase Requests & Orders API and Airbase Vendors API, and 6 more.

How much does the Airbase API cost?

APIs.io lists 2 pricing plans for Airbase, with each plan's price, limits and inclusions under Pricing on this page.

Is the Airbase API ready for AI agents?

Airbase has a Kin Score of 6.7 out of 100 (minimal) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-13.

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