The G2 API V2 provides programmatic access to G2's software reviews, buyer intent signals, competitive intelligence, and product data. Uses OAuth 2.0 for authentication. Enables integration of G2 buyer intent data into CRM, marketing automation, and sales workflows.
G2 API V2 is one of 4 APIs that [Business Software and Services Reviews
G2](https://apis.io/providers/business-software-and-services-reviews-g2/) publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include B2B, Software Reviews, Buyer Intent, and Competitive Intelligence. The published artifact set on APIs.io includes API documentation, an API reference, an OpenAPI specification, authentication docs, and rate-limit docs.
This API exposes
61 operations
across 54 paths,
organized into 26 resource areas,
and defines 4 schemas.
It is described by OpenAPI 3.0.1, at version v2.
Requests are made against a single base URL, https://{defaultHost}.
61 operations54 paths4 schemas3 DELETE48 GET1 PATCH8 POST1 PUT
Metadata
The identity and technical contract details declared by the specification.
Specification
OpenAPI 3.0.1
API Version
v2
Base URL
https://data.g2.com/api/v2/
Authentication
HTTP Bearer, OAuth 2.0
Resource Areas
26
Authentication & Security 2
G2 API V2 declares
2 security schemes
for authenticating requests.
It accepts HTTP bearer tokens (AccountAPIToken).
It supports OAuth 2.0 (G2OAuth) using the authorizationCode flow, exposing 6 scopes.
Paths & Operations 61
Across 54 paths, the API surfaces 61 operations — 3 DELETE, 48 GET, 1 PATCH, 8 POST, 1 PUT. They span 26 resource areas, including Buyer Intent, Screenshots, Product Features, Categories, G2 Activate, Market Signals, Credit Account, Data Subscriptions, and 18 more. Each is listed below with its method, path, parameters, and response codes.
The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are http_error (4 properties), cursor_pagination (3 properties), Errors (1 property). Each schema is shown below with its type and property counts.
cursor_pagination
object
3 properties
included
array
Errors
object
1 property
http_error
object
4 properties
Specification
The full machine-readable OpenAPI contract behind this narrative.
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