Is the OpenNous context graph open source?

Yes. The context graph is open source. You can read every line, self-host the whole engine on your own infrastructure, or keep the raw records in a database you own. OpenNous Cloud runs the same engine on a Free plan with 500 credits a month.

How does OpenNous keep every fact trustworthy?

Every fact is resolved, sourced, dated and permissioned before a person or an agent reads it: one person and one company however many systems they appear in, the call, email or record behind each answer, the date of its source, and the visibility of the record it came from.

Which ways into the graph are there?

REST for your code, MCP for your agents, webhooks for your workflows and a plugin for the Claude Code terminal. One account record sits behind all four.

OpenNous

Build on the context graph

Connect your GTM stack with the REST API, MCP or the Claude Code plugin, and work with every account inside your agents.

Get an API key View docs

ENDPOINT200 · 84 MS

GET /v2/accounts/vercel.com

{
  "icp": 82,
  "people": 6,
  "claims": 18,
  "sources": ["gmail", "granola", "hubspot", "posthog"]
}

ACCOUNT SIGNALSVERCEL

Budget confirmed for Q1CALL · 12 SEP

Champion replied3D AGO

Stage moved to evaluationCRM

Usage down since the demo2W

Invoice paid1 SEP

Competitor named in #deals6D

INTEGRATIONS

Gmail

Granola

Fireflies

Slack

Stripe

PostHogAND MORE

TWO-WAY SYNC

HubSpot⇄ACCOUNT · STAGE · OWNER

ACTION LAYER

Follow-up draftedAFTER EVERY CALLCRM updatedACCOUNT · STAGE · OWNERAccount handoffON CLOSED WONRisk flaggedCONTINUOUSLYMeeting prepBEFORE THE CALLWeekly reportMONDAY 07:00

Infrastructure you can trust.

Every fact is resolved, sourced, dated and permissioned before a person or an agent reads it.

Identity resolution. One person and one company, however many systems they appear in, so nobody works from a near-duplicate.

Account signals. Budget, authority, competitors, adoption and risk, read from what was actually said and dated to the day.

Sources on every fact. Every answer returns the call, email or record behind it, so your team checks a claim instead of believing one.

Permissions. A private thread stays private. Facts inherit the visibility of the record they came from, for people and agents alike.

Freshness. Each fact carries the date of its source, so a stale answer shows as stale instead of quietly wrong.

Your data, your infrastructure. Open source. Self-host the whole engine, or keep the raw records in a database you own.

Every account, as a graph. People, deals and conversations linked into one record, with the source behind every fact.

PNPriya NairECONOMIC BUYERSOSam OrtizCHAMPIONLPLee ParkIT LEADDEAL · EVALUATIONQ1 pilot · $40,000

Call · 12 Sep

Email thread

HubSpot record

#deals

VercelACCOUNT · ICP 82

GET /v2/accounts/vercel.com

CLAIM

Budget confirmed for Q1 Said by Priya Nair, economic buyer

Confidence0.92

Freshness3 days

Visibilityteam

SOURCES

“We've set budget aside for a Q1 pilot with two teams.”CALL · 12 SEP · 14:06

“Confirming the Q1 timeline on our side.”EMAIL · 14 SEP

SIGNALS

4 signals this monthEach one tied to the deal and kept current

Budget confirmed for Q1NewCALL · 12 SEP

Champion repliedOngoingEMAIL · 3D AGO

Stage moved to evaluationResolvedCRM · 10 SEP

Competitor named in #dealsNewSLACK · 6D AGO

GET /v2/events?account=vercel.com

Every way into the graph.

REST for your code, MCP for your agents, webhooks for your workflows and a plugin for the terminal. One account record behind all four.

REST API

The whole account in one call

Summary, claims with confidence and freshness, people and timeline. Look an account up by domain, email, LinkedIn URL or id.

POST /v2/context
{ "focus": "northwind.com" }

→ Pilot at $40k for Q1. Priya Nair is the economic buyer.
  DPA review open with IT.  // 4 sources · fresh

MCP SERVER

Context for any agent

Three tools that give Claude, Claude Code, Grok or your own agent the full account, on demand.

get_context get_account query

QUERY

Ask across every account

One question over the whole book, one ranked row per account back.

 Northwind LabsBudget $40k for Q1 BrightpathAsked for the security pack Halden & CoChampion replied 

WEBHOOKS

Signals, pushed as they happen

Subscribe once and every new signal lands at your endpoint, in Slack or with your agent.

{ "type": "deal.stalled",
  "account": "globex.com" }

CLAUDE CODE PLUGIN

Revenue work from the terminal

Briefs, follow-ups and pipeline reviews as Claude Code slash commands.

/brief/reach-out/review-pipeline

Deploy it yourself, or start now

The context graph is open source. Self-host the whole engine, or use OpenNous Cloud on the Free plan.

OPEN SOURCE

Self-host the revenue context graph

Read every line, run it on your own infrastructure and keep the raw records in a database you own.

$ git clone https://github.com/NousC/opennous

View on GitHub

OPENNOUS CLOUD

Start on the Free plan

500 credits a month, no card. Add OpenNous to Claude Code with one command.

$ claude mcp add --transport http opennous https://mcp.opennous.cloud/mcp

Get an API key