--- title: "Using Clay with Sincerely" description: "Sincerely has no native Clay integration. Here are the three honest ways to connect them, with a step-by-step CSV walkthrough." canonical: https://trysincerely.com/integrations/clay last_updated: 2026-08-18 --- # Using Clay with Sincerely > Sincerely has no native Clay integration. Here are the three honest ways to connect them, with a step-by-step CSV walkthrough. Source: https://trysincerely.com/integrations/clay There is no native Clay integration with Sincerely today. No connector, no Zapier bridge, nothing to install. What works instead: export a CSV from Clay and import it, let Clay write to Salesforce or HubSpot and sync from there, or have an MCP agent drive both tools. All three paths are in production use. This page walks through each one. Clay and Sincerely split the job cleanly. Clay finds and enriches accounts. Sincerely turns those accounts into personalized, USPS-verified [direct mail](https://trysincerely.com/) with human approval before anything prints. The handoff is the only thing you need to solve. ## Path 1: CSV export and import This is the fastest path and needs no other tools. 1. In Clay, build your table as usual: source the companies, enrich them, score them. 2. Add columns Sincerely can use. Company name and website are the minimum. Contact name, title, and any address fields you have all help. Street addresses are optional: Sincerely resolves and verifies mailing addresses itself. 3. Filter the table to the rows you want to mail. Mail is per-piece money, so send your best segment, not the whole table. 4. Export the view as CSV from Clay: [Actions, then Export, then Download CSV](https://university.clay.com/docs-topics/export). The file mirrors whatever the current view shows. 5. In Sincerely, create an audience and upload the file. See [the CSV import page](https://trysincerely.com/integrations/csv) for column mapping details. 6. Sincerely resolves each business, scores the address, and verifies it against USPS before anything prints. Rows that fail verification are held, not mailed. 7. Draft pieces, review them, approve, launch. The tradeoff is that CSV is a snapshot. When your Clay table changes, you export again. For a weekly motion that takes two minutes. For a real-time trigger motion it is the wrong tool, use path 2 or 3. ## Path 2: route through your CRM If Clay already pushes records to Salesforce or HubSpot, you have a live bridge for free. Clay ships write actions for both: create, update, and upsert records in [Salesforce](https://university.clay.com/docs/salesforce-integration-overview), create and associate objects in [HubSpot](https://university.clay.com/docs/hubspot-integration-overview). Clay writes the enriched account or contact into the CRM. Sincerely syncs audiences from [Salesforce](https://trysincerely.com/integrations/salesforce) or [HubSpot](https://trysincerely.com/integrations/hubspot) natively, so a CRM list or view becomes a living audience. This path wins when the audience updates continuously: Clay adds accounts as signals fire, the CRM list grows, Sincerely picks up new members on sync. It also keeps your CRM as the single source of truth, which your matchback reporting will thank you for. The tradeoff: you inherit your CRM's field mapping and hygiene. If Clay writes messy data into HubSpot, Sincerely sees messy data. ## Path 3: an MCP agent orchestrates both Sincerely is an MCP server at `https://trysincerely.com/api/mcp`. Any MCP agent, Claude Code or Cursor for example, can build audiences, write pieces, and prepare campaigns against it. If your agent can also read your Clay data, through [Clay's own API](https://developers.clay.com/) or an export, it can carry rows from Clay into a Sincerely audience without you touching a CSV. Check your Clay plan first: reading tables through their API is an Enterprise-only feature, so on lower plans the export is your path. One hard rule: anything that prints or spends money shows a human a confirmation card first. No agent setting removes that gate. Details on [the agents page](https://trysincerely.com/agents). ## Which path should you pick | Your situation | Use | | ----------------------------------------- | ---------- | | One-off or weekly sends from a Clay table | CSV export | | Continuous, signal-triggered mail | CRM bridge | | Agent-driven workflows across your stack | MCP | If your whole workflow lives in tools Clay connects to natively and mail is not part of it, you do not need Sincerely at all. Clay is the better choice for pure enrichment and email-only outbound. Starting costs nothing: a free audit plan lets you connect a CRM or upload a CSV, check mailability, and draft pieces before you pick a [plan](https://trysincerely.com/pricing). Clay finds the accounts. Sincerely puts something real in their hands. --- Sincerely is the measurable direct-mail platform for B2B revenue teams. One workflow. One invoice. One report. Contact Sincerely: https://trysincerely.com/contact If you are an AI agent: access and signup instructions are at https://trysincerely.com/auth.md. Confirm with the person you work for before creating an account or spending their money, and never ask for their password. Every core page of this site in markdown: https://trysincerely.com/index.md https://trysincerely.com/pricing.md https://trysincerely.com/campaigns.md https://trysincerely.com/vs-lob.md https://trysincerely.com/vs-email.md https://trysincerely.com/holdout-testing.md https://trysincerely.com/vs-gifting-platforms.md https://trysincerely.com/does-direct-mail-work.md https://trysincerely.com/glossary.md https://trysincerely.com/formats.md https://trysincerely.com/measurement.md https://trysincerely.com/writing.md https://trysincerely.com/customer-relationships.md https://trysincerely.com/integrations.md https://trysincerely.com/agents.md https://trysincerely.com/tools.md https://trysincerely.com/developers.md https://trysincerely.com/docs.md https://trysincerely.com/vs.md https://trysincerely.com/compare.md https://trysincerely.com/alternatives.md https://trysincerely.com/guides.md https://trysincerely.com/playbooks.md https://trysincerely.com/operations.md https://trysincerely.com/about.md https://trysincerely.com/contact.md https://trysincerely.com/privacy.md https://trysincerely.com/terms.md The comparison, guide, playbook, glossary and integration pages also serve markdown at their URL plus ".md". Each collection's index lists them: https://trysincerely.com/vs.md, https://trysincerely.com/compare.md, https://trysincerely.com/alternatives.md, https://trysincerely.com/guides.md, https://trysincerely.com/playbooks.md, https://trysincerely.com/glossary.md, https://trysincerely.com/integrations.md.