# BILL

**Canonical:** https://apis.io/providers/bill/  
**Website:** https://www.bill.com  
**APIs profiled:** 11

BILL (formerly Bill.com) is a cloud-based financial operations platform for small and midsize businesses that automates accounts payable, accounts receivable, and spend & expense management. The BILL API Platform exposes these workflows through the BILL v3 REST API and embeddable BILL Elements UI components, enabling partners and ERPs to integrate bill capture, approvals, payments, and real-time event notifications via webhooks. The API uses session-based authentication with API keys and developer keys against production and sandbox gateways.

## Kin Score — 42.1 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 42.1).

| Facet | Score |
|---|---|
| Discoverability | 72.2 |
| Contract Quality | 58.6 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 11.8 |
| Developer Ergonomics | 41.7 |
| Commercial Clarity | 44.7 |
| Access Clarity | 44.7 |

Regulatory layer — **Payments**: 31.3 (matched via tags).

## Agent readiness — 29.4 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (11)

- **BILL v3 API** — REST API providing full-breadth access to BILL's Accounts Payable, Accounts Receivable, and Spend & Expense capabilities including bills, invoices, vendors, customers, payments,...
- **BILL Elements** — Low-code, embeddable UI components that surface the BILL Accounts Payable workflow inside partner applications with minimal development effort.
- **BILL Authentication API** — The Authentication API from BILL — 5 operation(s) for authentication.
- **BILL Bills API** — The Bills API from BILL — 4 operation(s) for bills.
- **BILL Customers API** — The Customers API from BILL — 3 operation(s) for customers.
- **BILL Funding Accounts API** — The Funding Accounts API from BILL — 2 operation(s) for funding accounts.
- **BILL Invoices API** — The Invoices API from BILL — 3 operation(s) for invoices.
- **BILL Organizations API** — The Organizations API from BILL — 2 operation(s) for organizations.
- **BILL Payments API** — The Payments API from BILL — 5 operation(s) for payments.
- **BILL Vendors API** — The Vendors API from BILL — 3 operation(s) for vendors.
- **BILL Webhooks API** — The Webhooks API from BILL — 2 operation(s) for webhooks.

## Agentic access (1)

- **Bill Agentic Access** — 40 operations · 26 acting

## Security (2)

- **Bill Authentication** — apiKey · 1 scheme
- **Bill Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Accounts Payable, Accounts Receivable, Spend Management, Expense Management, Payments, Bill Pay, Financial Operations, Fintech

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/bill/). Scores are computed from the provider's own public artifacts under a published rubric.