Sphere

Sphere is a developer-first global indirect tax compliance platform that automates sales tax, VAT, and GST across nexus monitoring, registration, real-time calculation, and filing/remittance. Its REST API lets billing and checkout flows call the Sphere tax engine to calculate tax on transactions and export transaction data, authenticated with an X-API-KEY header.

Sphere publishes 2 APIs on the APIs.io network: Tax Calculation API and Transactions Export API. Tagged areas include Tax, Sales Tax, VAT, GST, and Compliance.

Sphere’s developer surface includes authentication, documentation, engineering blog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
36.0/100 thin ▬ flat Agent 37/100 agent ready Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessPaidSelf serve
2 APIs
TaxSales TaxVATGSTComplianceFinTech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 36.0/100 · thin
Contract Quality 16.3 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 6.9 / 10
Agent readiness — 37/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/sphere-tax: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

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

Sphere Tax Calculation API

The Tax Calculation API from Sphere — 1 operation(s) for tax calculation.

Sphere Transactions Export API

The Transactions Export API from Sphere — 3 operation(s) for transactions export.

Open Collections 1

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

Sphere Tax API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Sphere Tax Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sphere Tax Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Sphere Tax Finops

FINOPS

Security Posture 2

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

Sphere Tax Authentication

apiKey · 1 scheme

SECURITY

Sphere Tax Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Sphere Tax Agentic Access

4 operations · 3 acting

4 operations · 3 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

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 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: sphere-tax
url: https://raw.githubusercontent.com/api-evangelist/sphere-tax/refs/heads/main/apis.yml
name: Sphere
kind: company
description: Sphere is a developer-first global indirect tax compliance platform that automates sales tax, VAT, and GST across
  nexus monitoring, registration, real-time calculation, and filing/remittance. Its REST API lets billing and checkout flows
  call the Sphere tax engine to calculate tax on transactions and export transaction data, authenticated with an X-API-KEY
  header.
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sphere-tax.png
tags:
- Tax
- Sales Tax
- VAT
- GST
- Compliance
- FinTech
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.19'
apis:
- aid: sphere-tax:sphere-tax-tax-calculation-api
  name: Sphere Tax Calculation API
  description: The Tax Calculation API from Sphere — 1 operation(s) for tax calculation.
  humanURL: https://docs.getsphere.com/features/integrations/api/tax-calculation
  baseURL: https://server.getsphere.com
  tags:
  - Tax Calculation
  properties:
  - type: OpenAPI
    url: openapi/sphere-tax-tax-calculation-api-openapi.yml
  - type: Documentation
    url: https://docs.getsphere.com/features/integrations/api/tax-calculation
  - type: APIReference
    url: https://docs.getsphere.com/features/integrations/api
  - type: PostmanCollection
    url: collections/sphere-tax.postman_collection.json
  - type: OpenCollection
    url: collections/sphere-tax.opencollection.json
  - type: Documentation
    url: https://docs.getsphere.com/features/reports/transaction-export
  - type: Documentation
    url: https://docs.getsphere.com/features/registration
  - type: Documentation
    url: https://docs.getsphere.com/features/filing-and-remittance
  - type: Documentation
    url: https://docs.getsphere.com/features/monitoring
  - type: Documentation
    url: https://docs.getsphere.com/features/calculation
  - type: Documentation
    url: https://docs.getsphere.com/features/integrations
- aid: sphere-tax:sphere-tax-transactions-export-api
  name: Sphere Transactions Export API
  description: The Transactions Export API from Sphere — 3 operation(s) for transactions export.
  humanURL: https://docs.getsphere.com/features/integrations/api/tax-calculation
  baseURL: https://server.getsphere.com
  tags:
  - Transactions Export
  properties:
  - type: OpenAPI
    url: openapi/sphere-tax-transactions-export-api-openapi.yml
  - type: Documentation
    url: https://docs.getsphere.com/features/integrations/api/tax-calculation
  - type: APIReference
    url: https://docs.getsphere.com/features/integrations/api
  - type: PostmanCollection
    url: collections/sphere-tax.postman_collection.json
  - type: OpenCollection
    url: collections/sphere-tax.opencollection.json
  - type: Documentation
    url: https://docs.getsphere.com/features/reports/transaction-export
  - type: Documentation
    url: https://docs.getsphere.com/features/registration
  - type: Documentation
    url: https://docs.getsphere.com/features/filing-and-remittance
  - type: Documentation
    url: https://docs.getsphere.com/features/monitoring
  - type: Documentation
    url: https://docs.getsphere.com/features/calculation
  - type: Documentation
    url: https://docs.getsphere.com/features/integrations
common:
- type: AgenticAccess
  url: agentic-access/sphere-tax-agentic-access.yml
- type: DomainSecurity
  url: security/sphere-tax-domain-security.yml
- type: Authentication
  url: authentication/sphere-tax-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/getsphere
- type: Website
  url: https://www.getsphere.com/
- type: Documentation
  url: https://docs.getsphere.com/
- type: Plans
  url: plans/sphere-tax-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sphere-tax-rate-limits.yml
- type: FinOps
  url: finops/sphere-tax-finops.yml
- url: https://www.getsphere.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com