# Numeral

**Canonical:** https://apis.io/providers/numeral/  
**Website:** https://www.numeral.com/  
**APIs profiled:** 9

Numeral (Numeral HQ) is a sales-tax compliance and automation platform for ecommerce and SaaS companies. Its REST API calculates real-time sales tax by customer location at state, county, city, and district granularity, records transactions and refunds, and manages products and customers, while the broader platform handles registrations, nexus monitoring, filing, and remittance. Not to be confused with Numeral (numeral.io), an unrelated payment-operations company now part of Mambu.

## Kin Score — 34.9 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 34.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 49.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 21.5 (agent-aware)

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

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (9)

- **Numeral Filings API** — Sales-tax return filing and remittance (Autofile) across all US states, driven by recorded transactions. Filing and remittance are delivered as managed platform services rather ...
- **Numeral Registrations & Nexus API** — State sales-tax registration (Autoregister) and physical/economic nexus monitoring with state-crossing alerts. Provided as managed platform services on top of API-captured trans...
- **Numeral Webhooks** — Event notifications for compliance and transaction lifecycle changes (e.g., filing, registration, and nexus events). Webhook delivery is offered through the Numeral platform; no...
- **Numeral Customers API** — The Customers API from Numeral — 2 operation(s) for customers.
- **Numeral Health API** — The Health API from Numeral — 1 operation(s) for health.
- **Numeral Products API** — The Products API from Numeral — 2 operation(s) for products.
- **Numeral Refunds API** — The Refunds API from Numeral — 3 operation(s) for refunds.
- **Numeral Tax Calculations API** — The Tax Calculations API from Numeral — 2 operation(s) for tax calculations.
- **Numeral Transactions API** — The Transactions API from Numeral — 2 operation(s) for transactions.

## Agentic access (1)

- **Numeral Agentic Access** — 16 operations · 10 acting

## Security (2)

- **Numeral Authentication** — http · 1 scheme
- **Numeral Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Numeral Plans Pricing**

## Tags

Sales Tax, Tax Compliance, Tax Calculation, E-Commerce, Software-as-a-Service

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