GSTIN API

GSTIN API provides developer-friendly GST services for India, enabling real-time verification of GSTIN numbers, retrieval of taxpayer details, filing history, and e-invoicing status. The platform offers 20 free credits without requiring a credit card, making it accessible for developers and businesses to integrate GST compliance checks into their applications. It aims to simplify tax verification processes with a robust API, comprehensive documentation, and reliable performance.

GSTIN API publishes 2 API contracts indexed on the APIs.io network: Bulk API and Verification API. Tagged areas include Company, GST, India, Taxation, and API.

The GSTIN API catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

GSTIN API’s developer surface includes authentication, support, pricing, engineering blog, getting-started guide, API reference, and 22 more developer resources.

🌐 Visit website📡 Profile data on GitHub
59.1/100 strong Agent 37/100 agent ready Full breakdown ↓
scored 2026-10-18 · rubric v0.24.0
1 published contract
CompanyGSTIndiaTaxationAPI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-18 · rubric v0.24.0
Composite quality — 59.1/100 · strong
Contract Quality 13.4 / 21
Developer Ergonomics 10.4 / 17
Access Clarity 10.8 / 17
Operational Transparency 2.3 / 11
Contract Governance 7.2 / 10
Discoverability 4.9 / 9
Regulatory Posture 3.7 / 15
Agent readiness — 37/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 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
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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/.
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 github.com/api-evangelist/gstinapi: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

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

GSTIN API Bulk API

Verify a list of GSTINs as an asynchronous job.

GSTIN API Verification API

Verify a single GSTIN.

Pricing Plans 1

Published pricing tiers and plan structures.

Gstinapi Plans Pricing

2 plans

PLANS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Gstinapi Context

9 classes · 47 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

GSTIN API API Rules

18 rules · 17 errors 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

BulkJobEnvelope

3 properties

JSON SCHEMA

BulkJobRequest

3 properties

JSON SCHEMA

BulkJob

11 properties

JSON SCHEMA

BulkResultRow

6 properties

JSON SCHEMA

Pagination

5 properties

JSON SCHEMA

TaxpayerEnvelope

4 properties

JSON SCHEMA

Security Posture 2

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

Gstinapi Authentication

1 scheme

SECURITY

Gstinapi Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Gstinapi Agentic Access

6 operations · 2 acting

6 operations · 2 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

Login
Login
 DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 1

Reference material describing how the API behaves

APIReference
APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 DataModel
DataModel
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs
SDKs
 Packages
Packages
 GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans
Plans
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Pricing
Pricing

Company 2

The organization behind the API

Blog
Blog
 Website
Website

Other 2

Properties that don't map to a standard resource type

Hosts
Hosts
 Vendors
Vendors

Source (apis.yml)

apis.yml Raw ↑ 
aid: gstinapi
name: GSTIN API
image: https://gstinapi.com/images/og-image.png
description: GSTIN API provides developer-friendly GST services for India, enabling real-time verification of GSTIN numbers,
  retrieval of taxpayer details, filing history, and e-invoicing status. The platform offers 20 free credits without requiring
  a credit card, making it accessible for developers and businesses to integrate GST compliance checks into their applications.
  It aims to simplify tax verification processes with a robust API, comprehensive documentation, and reliable performance.
url: https://raw.githubusercontent.com/api-evangelist/gstinapi/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-18 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-17'
modified: '2026-10-17'
tags:
- Company
- GST
- India
- Taxation
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/gstinapi-agentic-access.yml
- type: Plans
  url: plans/gstinapi-plans-pricing.yml
- type: Spectral
  url: rules/gstinapi-rules.yml
- type: JSONLD
  url: json-ld/gstinapi-context.jsonld
- type: Vocabulary
  url: vocabulary/gstinapi-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/gstinapi-data-model.yml
- type: Authentication
  url: authentication/gstinapi-authentication.yml
- type: ErrorCatalog
  url: errors/gstinapi-problem-types.yml
- type: Conformance
  url: conformance/gstinapi-conformance.yml
- type: LLMsTxt
  url: llms/gstinapi-llms.txt
- type: Hosts
  url: hosts/gstinapi-hosts.yml
- type: Vendors
  url: vendors/gstinapi-vendors.yml
- type: SDKs
  url: packages/gstinapi-packages.yml
- type: Packages
  url: packages/gstinapi-packages.yml
- type: TermsOfService
  url: https://gstinapi.com/terms
- type: Support
  url: https://gstinapi.com/google-sheets-gst-add-on/support
- type: StatusPage
  url: https://gstinapi.com/status
- type: PrivacyPolicy
  url: https://gstinapi.com/privacy
- type: Pricing
  url: https://gstinapi.com/pricing
- type: Login
  url: https://gstinapi.com/login
- type: GitHubOrganization
  url: https://github.com/dlminds
- type: DeveloperPortal
  url: https://gstinapi.com/developers
- type: Blog
  url: https://gstinapi.com/blog
- type: GettingStarted
  url: https://gstinapi.com/blog/gst-verification-vendor-onboarding
- type: APIReference
  url: https://gstinapi.com/docs
- type: DomainSecurity
  url: security/gstinapi-domain-security.yml
- type: Website
  url: https://gstinapi.com/
apis:
- aid: gstinapi:gstinapi-bulk-api
  name: GSTIN API Bulk API
  description: Verify a list of GSTINs as an asynchronous job.
  humanURL: https://gstinapi.com/docs
  tags:
  - Bulk
  properties:
  - type: OpenAPI
    url: openapi/gstinapi-bulk-api-openapi.yml
  - type: JSONSchema
    url: json-schema/gstinapi-bulk-job-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-taxpayer-envelope-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-bulk-result-row-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-bulk-job-request-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-bulk-job-envelope-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-pagination-schema.json
- aid: gstinapi:gstinapi-verification-api
  name: GSTIN API Verification API
  description: Verify a single GSTIN.
  humanURL: https://gstinapi.com/docs
  tags:
  - Verification
  properties:
  - type: OpenAPI
    url: openapi/gstinapi-verification-api-openapi.yml
  - type: JSONSchema
    url: json-schema/gstinapi-bulk-job-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-taxpayer-envelope-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-bulk-result-row-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-bulk-job-request-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-bulk-job-envelope-schema.json
  - type: JSONSchema
    url: json-schema/gstinapi-pagination-schema.json
x-enrichment:
  date: '2026-10-18'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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