G2
G2 is the world's largest B2B software marketplace, built on more than three million verified peer reviews and used by over 100 million software buyers a year. The G2 API provides programmatic access to G2's product catalog, category taxonomy, vendor records, reviews, badges, Grid reports, buyer intent signals and competitive intelligence. The v2 REST surface is a JSON:API contract of 62 operations served from data.g2.com, alongside a separate Data Solutions API for enriched flat-structure review data and a first-party remote MCP server at mcp.g2.com that exposes 21 tools to AI agents over OAuth 2.0. Authentication is by Developer Portal account token or OAuth 2.0 authorization code with PKCE, and most data surfaces are gated by subscription entitlement.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles G2 the way a machine reads it — 27 machine-readable artifacts across 3 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — G2 scores 65.6/100 (strong), with a separate agent-readiness read of 49/100 (agent native). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile G2
Each block below is one kind of artifact we hold for G2. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 3
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
G2 API
The G2 API provides programmatic access to G2's product, category, and review data. It enables developers to retrieve software product listings, user reviews, category taxonomie...
G2 Data Solutions API
The G2 Data Solutions API returns enriched G2 review data with flat attribute structures, intended for investors, private equity and analytics teams that need product momentum, ...
G2 MCP Server
G2's first-party remote Model Context Protocol server. It exposes 21 tools covering buyer intent signals, competitive intelligence, the product and category catalog, vendor reco...
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
G2 MCP Server
G2's first-party remote MCP server. Exposes G2 buyer intent data, competitive intelligence, the product/category catalog and review analytics to MCP clients over OAuth 2.0. Read...
MCP SERVERPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
G2 Plans Pricing
PLANSRate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
G2 Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
G2 Finops
FINOPSFeatures 5
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
Product Data Access
Retrieve detailed product listings including descriptions, ratings, and competitive positioning.
Review Syndication
Syndicate authenticated user reviews to your own platforms and partner sites.
Category Taxonomy
Access G2's comprehensive software category taxonomy for classification and discovery.
Competitive Intelligence
Compare products side-by-side using G2's crowd-sourced review data.
Buyer Intent Data
Access buyer intent signals showing which companies are researching products in your category.
Event Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
G2 Webhooks
ASYNCAPISecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Use Cases 4
What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.
What developers build with this provider.
Review Aggregation
Pull and display G2 reviews on your own website or product pages.
Market Research
Analyze software categories and competitive landscapes using G2's product data.
Sales Intelligence
Leverage buyer intent data to identify prospects actively researching solutions.
Product Comparison
Build comparison tools using G2's product ratings and review data.
Integrations 5
Pre-built integrations with other platforms tell you where this provider already fits in a stack.
Pre-built integrations with other platforms and tools.
Salesforce
Sync G2 buyer intent data and reviews directly into Salesforce CRM.
HubSpot
Integrate G2 data with HubSpot for marketing and sales workflows.
Slack
Receive notifications about new reviews and buyer intent signals in Slack.
Leverage G2 data for LinkedIn advertising and account targeting.
Marketo
Push G2 buyer intent signals into Marketo for demand generation campaigns.
Resources
Every other property we hold for G2 — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 6
Portal, sign-up, and the first successful call
Documentation 3
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 8 ·
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 6
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 5
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 2
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/g2 · machine-readable index on apis.io
This is an independent, third-party profile of G2, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.