Sumble

Research companies, their tech stacks, teams and staff from an AI agent.

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What the Sumble connector does

The Sumble MCP server connects Sumble — a company-intelligence database built from job postings and public professional profiles — to Claude, ChatGPT and any MCP-compatible agent. Sumble documents 34 tools that research an organization's technology stack, team structure, hiring and staff, and that reveal contact details for named individuals. Sign-in is OAuth; usage is metered in credits.

Verified connector

Listed by Anthropic as a partner connector in its Connectors Directory.

Connection checked by Agentman on .

Anthropic states this reflects the level of review a connector received, not a security audit.

Sumble tools (34)

  • GetAccountInformation
  • GetMyCompanyProfile
  • LogOut
  • SearchTechnologies
  • FindOrganizations
  • EnrichOrganization
  • MatchOrganizations
  • ListOrganizationLists
  • GetOrganizationList
  • CreateOrganizationList
  • AddOrganizationsToList
  • ListContactLists
  • GetContactList
  • CreateContactList
  • AddContactsToList
  • FindJobs
  • GetJobDescription
  • FindRelatedPeopleToJob
  • FindPeople
  • EnrichPerson
  • FindRelatedPeopleToPerson
  • Query
  • ListTables

Tool names from Anthropic's directory listing. This server requires sign-in, so we could not read tool descriptions or parameter schemas.

Limits

  • No OAuth scopes exist. Sumble's authorization server metadata and its RFC 9728 resource descriptor both omit scopes_supported entirely — absent, not empty. Nothing at the grant separates reading a company profile from revealing a phone number or soft-deleting a list. The boundary that matters here, between the routine read and the 80-credit contact reveal, is enforced by the tool's own parameter design rather than by consent.
  • Anthropic's directory listing is 11 names out of date and omits every consequential tool. Rely on Sumble's documentation, not the listing.
  • We could not read tool schemas or safety annotations. The endpoint returned 401 anonymously, so no parameter-level detail or readOnlyHint is published here. Everything below tool level comes from Sumble's REST documentation and OpenAPI spec, which the MCP tools mirror.
  • RunSqlQuery makes the read surface unenumerable. Any table ListTables reports is reachable. Sumble bills it by response size, so a careless query is expensive rather than blocked.
  • Sumble's two credit tables disagree. Its API documentation prices organizations at "1 base credit + 1 per paid attribute"; its web-app credits page prices an organization export at "5 credits per row, per filter term". Both were live on 2026-08-22. Check your actual usage page rather than budgeting from either table.
  • Purchased credits expire. Sumble states purchased credits expire three months after purchase and that monthly allocations do not roll over. Credits are non-refundable.
  • People search is organization-scoped, always. Sumble requires organization_ids or a saved organization list on every people query. You cannot search the whole database for a person by attribute alone.
  • Contact reveals are capped at 25 people per request and related people at 25 per request, so bulk contact extraction through the agent is throttled by design.
  • Coverage is skewed. Sumble states coverage is "deepest for technology companies and companies with active hiring", because job posts are a primary source. A company that does not post jobs is thinly covered by construction.
  • Intelligence briefs are LLM-generated by a third party. Sumble states the briefs surfaced through the MCP server are generated by Google's Gemini models, and names Google, OpenAI and Anthropic as LLM subprocessors. A 50-credit brief is model output over structured data, not a record.
  • There is no Teams tool. Sumble's REST API publishes a /v9/teams endpoint with ICP scoring and per-team people, and no MCP tool exposes it. Team data reaches the agent only as a metric on the organizations tool.
  • Rate limits are 10 requests per second per user across all endpoints, returning HTTP 429. Insufficient credits return HTTP 402 before any work is done.

Frequently asked questions

How many tools does the Sumble MCP server have?

Sumble's own documentation tables 34, and Anthropic's directory lists 23. The 23 are stale: Sumble states its unified endpoints replaced the previous find, match and enrich endpoints, and eleven directory names describe that older shape. Treat the vendor's 34 as current and the directory as a snapshot taken before the rewrite.

Can the Sumble connector reveal someone's email address or phone number?

Yes. FindMatchAndEnrichPeople takes optional email and phone contact attributes that Sumble documents as reveals, charged at 10 credits for a first email and 80 for a first phone. They are never included in the all attribute selector and must be asked for explicitly, so a reveal is always a deliberate request rather than a side effect of enrichment.

Does the Sumble connector let an agent run arbitrary SQL?

Yes, read-only. Sumble documents a RunSqlQuery tool that runs SQL against its DuckDB and labels it a last resort, with ListTables enumerating every table and column. The read surface is therefore whatever that database holds rather than what the other tools expose, and it is billed by response size at one credit per 100 bytes.

What OAuth permissions does the Sumble MCP server request?

None that narrow anything. Sumble's authorization server metadata at mcp.sumble.com advertised no scopes_supported on 2026-08-22, and its RFC 9728 resource descriptor omits the field too. There is no consent-time choice between reading a company profile, revealing a phone number, and deleting a saved list.

Can the Sumble connector delete anything?

It can soft-delete a saved organization list. The tool is named SetOrganizationListDeleted and takes a boolean, so no delete verb appears in any tool name. Sumble documents the deletion as reversible by passing false, and states it preserves the organizations in the list. No tool deletes a contact list, a person or a company.

Does the Sumble connector send email to anyone?

Yes, to Sumble's own teams. ReportDataQualityIssue and SubmitSupportRequest both create support tickets, and Sumble's API documentation states the reply-to address on every such email is your account email. Both are free of credits. Nothing in the tool set emails a prospect, a contact or anyone outside Sumble.

What personal data can the Sumble connector read about employees?

Name, job title, function, seniority, location, country, employer, LinkedIn URL and skills for people at any company Sumble covers, plus optional email and phone reveals. Sumble states this comes from public professional profiles and job posts. It also returns inferred managers and direct reports, which Sumble notes are inferred from org structure rather than actual reporting lines.

How much does the Sumble MCP server cost to use?

Every data call spends credits from your Sumble account. The free plan gets 500 credits a month and Pro gets 9,900, both resetting each billing cycle without rollover. An intelligence brief costs 50 credits and a first phone reveal costs 80, so a free account can afford roughly six phone reveals a month.

Do I need a paid Claude plan to use the Sumble connector?

For Claude web and desktop, yes. Sumble's compatibility table lists Claude as paid plans only, and notes Team and Enterprise admins must enable connectors first. Claude Code is the exception — Sumble states it works on all Claude Code plans, added with claude mcp add against the same endpoint.

Sources

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