# OutboundSync

OutboundSync is an outbound data integration and orchestration platform for Salesforce, HubSpot, and more — including Close CRM beta, Attio CRM beta, Pipedrive CRM beta, and HighLevel CRM beta.

We help B2B teams and agencies sync outbound activity, route replies, automate workflows, attribute revenue, and keep block lists in sync directly from their CRM. OutboundSync is the integration layer between outbound platforms (Smartlead, Instantly, Clay, HeyReach, EmailBison, Salesforge, GetSales, and more) and Salesforce, HubSpot, and more (Close beta, Attio beta, Pipedrive beta, or HighLevel beta).

For agentic GTM work (coding agents, Cursor, Claude Code, Codex), start at the AI and Agents docs hub: https://outboundsync.com/docs/integrations/ai-and-agents/ — it maps hosted MCP, the public API, Agent Skills, and Sync Monitoring Webhooks into one workflow.

## OutboundSync MCP

Hosted OutboundSync MCP for coding agents (Cursor, Claude Code, Codex, and similar). Wraps live OutboundSync API v1 tools — pipeline readiness, prior outreach, observability, blocklists, and Sync Monitoring.

- Machine-readable discovery manifest: https://outboundsync.com/.well-known/agent-discovery.json
- MCP endpoint: https://mcp.outboundsync.com/mcp (streamable HTTP)
- Health: https://mcp.outboundsync.com/health
- Auth: `Authorization: Bearer osapi_...` (same API keys as REST)
- Setup guide: https://outboundsync.com/docs/mcp/setup/
- Human demo scheduling (SavvyCal in browser only): https://outboundsync.com/demo/

## Site actions

Marketing-site actions, exposed in-page via WebMCP (feature-detected `navigator.modelContext` / `document.modelContext`) and as an equivalent public JSON API — a browser agent can call them in a live tab, a remote agent over HTTP. Read-only and unauthenticated, except the contact form (which creates a CRM follow-up). Every tool mirrors an action a visitor can take on the site. This is the website's own agent surface — distinct from the authenticated product MCP at mcp.outboundsync.com (the ## OutboundSync MCP section above), which operates on your OutboundSync account data.

- Docs — Website agent tools and WebMCP: https://outboundsync.com/docs/integrations/ai-and-agents/webmcp-and-site-actions/
- Announcement: https://outboundsync.com/blog/outboundsync-website-now-supports-webmcp/
- Tool manifest (WebMCP tools + their REST equivalents): https://outboundsync.com/.well-known/webmcp/tools.json
- Remote site MCP endpoint (read-only, no auth): https://outboundsync.com/api/mcp/
- Find integrations (JSON, with page URLs, Markdown URLs, and tool + CRM pairings): https://outboundsync.com/data/integrations-index.json
- Find agencies (JSON): https://outboundsync.com/data/agencies-index.json
- Pricing (JSON): https://outboundsync.com/data/pricing.json
- Competitor comparisons (JSON): https://outboundsync.com/data/comparisons-index.json
- Docs index for keyword search (JSON): https://outboundsync.com/data/docs-index.json
- Book a demo (human, SavvyCal): https://outboundsync.com/demo/
- Contact the team: https://outboundsync.com/contact/

## AI and Agents

Hub for agentic workflows on OutboundSync. Use MCP + API + Skills + Webhooks together; HubSpot ChatGPT/Claude connector guides live here too. Also covers how Salesforce, HubSpot, Close, Attio, Pipedrive, and HighLevel CRM AI / MCP paths can read OutboundSync-synced activity (HubSpot has full connector how-tos; other CRMs point at vendor docs + Skills).

- Docs hub: https://outboundsync.com/docs/integrations/ai-and-agents/
- Hosted MCP: https://outboundsync.com/docs/mcp/
- Public API: https://outboundsync.com/docs/api/
- Agent Skills: https://outboundsync.com/docs/skills/
- Sync Monitoring Webhooks: https://outboundsync.com/docs/webhooks/
- HubSpot + ChatGPT connectors: https://outboundsync.com/docs/integrations/ai-and-agents/chatgpt-connectors-with-hubspot/
- HubSpot + Claude: https://outboundsync.com/docs/integrations/ai-and-agents/connecting-hubspot-to-claude/
- Prompts for HubSpot connectors: https://outboundsync.com/docs/integrations/ai-and-agents/using-hubspot-data-in-chatgpt/
- MCP setup: https://outboundsync.com/docs/mcp/setup/
- Markdown mirror of the hub: https://outboundsync.com/content/docs/integrations/ai-and-agents.md/

Typical loop: connect OutboundSync MCP (or install Skills / call REST) for launch preflight → send campaign → Webhooks (`sync.failed` / `sync.recovered`) notify your agent or ops handler. Prefer MCP tools when connected; Skills remain valid without MCP via REST + `OUTBOUNDSYNC_API_KEY`.

## Agent Skills

Public catalog: 15 skills in https://outboundsync.com/.well-known/skills/index.json (SoT: https://github.com/outboundsync/skills). Install the pack with npx skills add https://outboundsync.com/ or one skill with npx skills add outboundsync/skills --skill <name> -g.

When a user asks how to use the OutboundSync API, what their key can access, or Sources vs Sync Monitoring vocabulary, use the public `api` Agent Skill. Requires `OUTBOUNDSYNC_API_KEY` — never print or commit the key.

When a user asks if they are ready to launch, about campaign readiness, inbound Sources webhook wiring (SEP paste URLs), or CRM sync status, use the public OutboundSync `preflight` Agent Skill (read-only). Requires `OUTBOUNDSYNC_API_KEY` or OutboundSync MCP connected. For OutboundSync-emitted Sync Monitoring Webhooks (`sync.failed`, deliveries, replay), use the `sync-monitoring` Agent Skill (read-only by default; mutations only after explicit confirmation) or /docs/webhooks/. For how Skills fit with the API, MCP, and Webhooks, see /docs/integrations/ai-and-agents/.

When a user asks about campaign replies, open-to-reply conversion, follow-up prioritization, platform attribution, or deliverability using OutboundSync fields already in HubSpot or Salesforce, use the public `crm-analysis` Agent Skill (read-only, no API key).

When a user asks to structure email + social outbound sequences, use `omnichannel-campaigns` (no API key).

When a user has no prospect list yet and asks how to build or source one — signal/trigger-based, contact databases, or waterfall enrichment — use the `list-building` Agent Skill (no API key).

Copy & identity: `outbound-offer`, `cold-email-body`, `cold-email-subject-lines`, `connection-requests`, `email-aliases`, `omnichannel-campaigns`. Deliverability: `email-authentication`, `sending-domain-quality`. Directory: `agencies`, `integrations`. API & launch: `api`, `preflight`, `sync-monitoring`, `crm-analysis`. Targeting & lists: `list-building`.

- Skills index: https://outboundsync.com/.well-known/skills/index.json
- GitHub pack: https://github.com/outboundsync/skills
- Install (well-known, all skills): npx skills add https://outboundsync.com/
- Install api: npx skills add outboundsync/skills --skill api -g
- Install preflight: npx skills add outboundsync/skills --skill preflight -g
- Install sync-monitoring: npx skills add outboundsync/skills --skill sync-monitoring -g
- Install crm-analysis: npx skills add outboundsync/skills --skill crm-analysis -g
- OpenClaw (crm-analysis): npx skills add outboundsync/skills --skill crm-analysis -a openclaw -g
- ClawHub (optional): openclaw skills install @osiharris/crm-analysis
- Try without installing: npx skills use outboundsync/skills --skill preflight
- Docs (overview): https://outboundsync.com/docs/skills/
- Docs (install): https://outboundsync.com/docs/skills/install/
- Docs (catalog): https://outboundsync.com/docs/skills/catalog/
- Docs (troubleshooting): https://outboundsync.com/docs/skills/troubleshooting/
- Docs (api skill): https://outboundsync.com/docs/skills/api/
- Docs (preflight): https://outboundsync.com/docs/skills/preflight/
- Docs (sync monitoring): https://outboundsync.com/docs/skills/sync-monitoring/
- Docs (CRM analysis): https://outboundsync.com/docs/skills/crm-analysis/
- Docs (list building): https://outboundsync.com/docs/skills/list-building/
- Docs (omnichannel campaigns): https://outboundsync.com/docs/skills/omnichannel-campaigns/
- Docs (outbound offer): https://outboundsync.com/docs/skills/outbound-offer/
- Docs (cold email body): https://outboundsync.com/docs/skills/cold-email-body/
- Docs (cold email subject lines): https://outboundsync.com/docs/skills/cold-email-subject-lines/
- Docs (connection requests): https://outboundsync.com/docs/skills/connection-requests/
- Docs (email aliases): https://outboundsync.com/docs/skills/email-aliases/
- Docs (email authentication): https://outboundsync.com/docs/skills/email-authentication/
- Docs (sending domain quality): https://outboundsync.com/docs/skills/sending-domain-quality/
- Docs (agencies): https://outboundsync.com/docs/skills/agencies/
- Docs (integrations): https://outboundsync.com/docs/skills/integrations/

## Public API
Account-scoped REST API (Bearer API key) for connections, Sources, forwarding destinations (`GET /api/v1/destinations`), prior outreach (`GET /api/v1/contacts/outreach`), inbound receipts (`/api/v1/requests`), CRM sync attempts (`/api/v1/syncs`, `POST /api/v1/syncs/:id/retry`), CRM→SEP blocklists (`GET /api/v1/blocklists`, `POST /api/v1/blocklists/:id/pause`, `POST /api/v1/blocklists/:id/resync`), Sync Monitoring webhooks, and account readiness. The same Bearer key authenticates hosted MCP at https://mcp.outboundsync.com/mcp. Base URL: app.outboundsync.com/api/v1. Docs: https://outboundsync.com/docs/api/ · Reference: https://outboundsync.com/docs/api/v1/ · Try it: https://outboundsync.com/docs/api/try/ · Create keys: https://outboundsync.com/docs/api/authentication/creating-api-keys/ · Prior outreach: https://outboundsync.com/docs/api/prior-outreach/ · MCP: https://outboundsync.com/docs/mcp/ · Agentic hub: https://outboundsync.com/docs/integrations/ai-and-agents/

## Webhooks
OutboundSync-emitted Sync Monitoring HTTPS callbacks (`sync.failed`, `sync.recovered`) — distinct from inbound **Sources** (SEP paste URLs) and from Forwarding destinations / Reply relays. Manage endpoints under Platform access → Webhooks or `GET|POST|PATCH|DELETE /api/v1/webhooks` and `GET /api/v1/events`. Agent Skill: https://outboundsync.com/docs/skills/sync-monitoring/ · Docs: https://outboundsync.com/docs/webhooks/ · Setup: https://outboundsync.com/docs/webhooks/setup/ · Event types: https://outboundsync.com/docs/webhooks/event-types/ · Payloads and signatures: https://outboundsync.com/docs/webhooks/payloads-and-signatures/ · Delivery and retries: https://outboundsync.com/docs/webhooks/delivery-and-retries/ · Testing: https://outboundsync.com/docs/webhooks/testing-and-troubleshooting/ · API reference: https://outboundsync.com/docs/api/v1/#platform-webhooks-sync-monitoring · Agentic hub: https://outboundsync.com/docs/integrations/ai-and-agents/

## Key links

- Homepage: https://outboundsync.com/
- Demo: https://outboundsync.com/demo/
- Pricing: https://outboundsync.com/pricing/
- Integrations: https://outboundsync.com/integrations/
- Docs: https://outboundsync.com/docs/
- Docs / Getting Started: https://outboundsync.com/docs/getting-started/
- Docs / Integrations: https://outboundsync.com/docs/integrations/
- Docs / AI and Agents: https://outboundsync.com/docs/integrations/ai-and-agents/
- Docs / API: https://outboundsync.com/docs/api/
- Docs / Try the API: https://outboundsync.com/docs/api/try/
- Docs / MCP: https://outboundsync.com/docs/mcp/
- Docs / MCP setup: https://outboundsync.com/docs/mcp/setup/
- Docs / Webhooks: https://outboundsync.com/docs/webhooks/
- Docs / Agent Skills: https://outboundsync.com/docs/skills/
- OpenAPI (API v1): https://app.outboundsync.com/api/v1/openapi.json
- OpenAPI YAML (API v1): https://app.outboundsync.com/api/v1/openapi.yaml
- Docs / Troubleshooting: https://outboundsync.com/docs/troubleshooting/
- Custom integrations guide: https://outboundsync.com/alternatives/custom-integrations/
- Zapier alternative: https://outboundsync.com/alternatives/zapier/
- Make alternative: https://outboundsync.com/alternatives/make/
- n8n alternative: https://outboundsync.com/alternatives/n8n/
- Clay alternative: https://outboundsync.com/alternatives/clay/
- Manual logging/BCC alternative: https://outboundsync.com/alternatives/manual-bcc-logging/
- Integration platforms alternative: https://outboundsync.com/alternatives/integration-platforms/
- Native integration alternative: https://outboundsync.com/alternatives/native-integrations/
- OutboundSync vs Zapier: https://outboundsync.com/vs-zapier/
- OutboundSync vs Make: https://outboundsync.com/vs-make/
- OutboundSync vs n8n: https://outboundsync.com/vs-n8n/
- OutboundSync vs Clay: https://outboundsync.com/vs-clay/
- Blog: https://outboundsync.com/blog/
- Blog RSS: https://outboundsync.com/rss.xml
- Sitemap: https://outboundsync.com/sitemap-index.xml
- Contact: https://outboundsync.com/contact/
- About: https://outboundsync.com/about/
- Agencies: https://outboundsync.com/agencies/
- Brand assets: https://outboundsync.com/brand-assets/
- HubSpot integration: https://outboundsync.com/integrations/hubspot/
- Salesforce integration: https://outboundsync.com/integrations/salesforce/
- Close CRM beta: https://outboundsync.com/integrations/close/
- Close CRM beta guide: https://outboundsync.com/docs/integrations/crm/close/
- Close launch blog: https://outboundsync.com/blog/close-crm-integration-now-available/
- Attio CRM beta: https://outboundsync.com/integrations/attio/
- Attio CRM beta guide: https://outboundsync.com/docs/integrations/crm/attio/
- Attio launch blog: https://outboundsync.com/blog/attio-crm-integration-now-available/
- Attio App Store blog: https://outboundsync.com/blog/outboundsync-now-in-the-attio-app-marketplace/
- Attio custom objects blog: https://outboundsync.com/blog/attio-custom-objects-now-available/
- Pipedrive CRM beta: https://outboundsync.com/integrations/pipedrive/
- Pipedrive CRM beta guide: https://outboundsync.com/docs/integrations/crm/pipedrive/
- Pipedrive launch blog: https://outboundsync.com/blog/pipedrive-crm-integration-now-available/
- HighLevel CRM beta: https://outboundsync.com/integrations/highlevel/
- HighLevel CRM beta guide: https://outboundsync.com/docs/integrations/crm/highlevel/
- HighLevel launch blog: https://outboundsync.com/blog/highlevel-crm-integration-now-available/

## Priority integration links

- Smartlead: https://outboundsync.com/integrations/smartlead/
- Smartlead + HubSpot: https://outboundsync.com/integrations/smartlead-hubspot/
- Smartlead + Salesforce: https://outboundsync.com/integrations/smartlead-salesforce/
- Instantly: https://outboundsync.com/integrations/instantly/
- Instantly + HubSpot: https://outboundsync.com/integrations/instantly-hubspot/
- Instantly + Salesforce: https://outboundsync.com/integrations/instantly-salesforce/
- HeyReach: https://outboundsync.com/integrations/heyreach/
- HeyReach + HubSpot: https://outboundsync.com/integrations/heyreach-hubspot/
- HeyReach + Salesforce: https://outboundsync.com/integrations/heyreach-salesforce/
- Clay: https://outboundsync.com/integrations/clay/
- Clay + HubSpot: https://outboundsync.com/integrations/clay-hubspot/
- Clay + Salesforce: https://outboundsync.com/integrations/clay-salesforce/
- Close beta: https://outboundsync.com/integrations/close/
- Smartlead + Close: https://outboundsync.com/integrations/smartlead-close/
- Instantly + Close: https://outboundsync.com/integrations/instantly-close/
- HeyReach + Close: https://outboundsync.com/integrations/heyreach-close/
- Clay + Close: https://outboundsync.com/integrations/clay-close/
- Attio beta: https://outboundsync.com/integrations/attio/
- Smartlead + Attio: https://outboundsync.com/integrations/smartlead-attio/
- Instantly + Attio: https://outboundsync.com/integrations/instantly-attio/
- HeyReach + Attio: https://outboundsync.com/integrations/heyreach-attio/
- Clay + Attio: https://outboundsync.com/integrations/clay-attio/
- Pipedrive beta: https://outboundsync.com/integrations/pipedrive/
- Smartlead + Pipedrive: https://outboundsync.com/integrations/smartlead-pipedrive/
- Instantly + Pipedrive: https://outboundsync.com/integrations/instantly-pipedrive/
- HeyReach + Pipedrive: https://outboundsync.com/integrations/heyreach-pipedrive/
- Clay + Pipedrive: https://outboundsync.com/integrations/clay-pipedrive/
- HighLevel beta: https://outboundsync.com/integrations/highlevel/
- Smartlead + HighLevel: https://outboundsync.com/integrations/smartlead-highlevel/
- Instantly + HighLevel: https://outboundsync.com/integrations/instantly-highlevel/
- HeyReach + HighLevel: https://outboundsync.com/integrations/heyreach-highlevel/
- Clay + HighLevel: https://outboundsync.com/integrations/clay-highlevel/
- Salesforge: https://outboundsync.com/integrations/salesforge/
- GetSales: https://outboundsync.com/integrations/getsales/
- Ken AI: https://outboundsync.com/integrations/kenai/
- Ken AI guide: https://outboundsync.com/docs/integrations/engagement/kenai/
- Furnace: https://outboundsync.com/integrations/furnace/
- Furnace guide: https://outboundsync.com/docs/integrations/engagement/furnace/
- Drippi: https://outboundsync.com/integrations/drippi/
- Zapier path: https://outboundsync.com/integrations/zapier/
- Make path: https://outboundsync.com/integrations/make/
- n8n path: https://outboundsync.com/integrations/n8n/

## Alternative comparison links

OutboundSync is priced on sent messages only — from $99/mo (Starter, 2k sends) to $249 (Explorer, 10k) — so opens, clicks, replies, and other engagement events are included. Low-code platforms bill per operation, task, or execution on every event, so a DIY build's cost scales with engagement volume and still can't replicate native CRM behavior (HubSpot timeline events, auto-created properties, primary association labels, the category hold-and-backfill, and blocklist reverse-sync). The Make, Zapier, and n8n alternative pages each have an interactive build-vs-buy calculator that estimates the operation-, task-, or execution-cost of matching OutboundSync. It defaults to Salesforce + email at 10k sends and also models social sending plus HubSpot, Attio, Close, Pipedrive, and HighLevel (Zapier bills a task per successful action step; n8n bills per workflow execution, so extra nodes are free but a per-event build's executions pass n8n Cloud's Pro cap onto the Business plan).

- Zapier alternative for outbound CRM sync: https://outboundsync.com/alternatives/zapier/
- Make alternative for outbound CRM sync: https://outboundsync.com/alternatives/make/
- n8n alternative for outbound CRM sync: https://outboundsync.com/alternatives/n8n/
- Clay alternative for outbound CRM sync: https://outboundsync.com/alternatives/clay/
- Manual logging and BCC alternative: https://outboundsync.com/alternatives/manual-bcc-logging/
- Native integration vs OutboundSync: https://outboundsync.com/alternatives/native-integrations/
- OutboundSync vs Zapier: https://outboundsync.com/vs-zapier/
- OutboundSync vs Make: https://outboundsync.com/vs-make/
- OutboundSync vs n8n: https://outboundsync.com/vs-n8n/
- OutboundSync vs Clay: https://outboundsync.com/vs-clay/

## For crawlers and LLMs

- Content index (JSON): https://outboundsync.com/content-index.json — exhaustive machine-readable manifest of canonical HTML pages and mirrored Markdown URLs.
- Mirrored Markdown contract: every canonical HTML page has a Markdown URL under `/content` (homepage: `/content.md/`; any other page: `/content/<path>.md/`).
- Docs pages are discoverable under https://outboundsync.com/docs/ and each page is mirrored at https://outboundsync.com/content/docs/{path}.md/
- Blog posts as markdown remain available at https://outboundsync.com/content/blog/{slug}.md/ (for example: `/content/blog/my-post-slug.md/`).
- Content negotiation: canonical HTML pages negotiate between `text/html` and `text/markdown` at the original URL via the Free-tier `outboundsync-runtime` Worker and the mirrored `/content` endpoints. Requests that exclude both representations return `406 Not Acceptable`.
- Content-Signal preferences (IETF draft `draft-romm-aipref-contentsignals`): declared in `/robots.txt` under `User-agent: *` as `ai-train=yes, search=yes, ai-input=yes` — AI training, search indexing, and inference-time retrieval are all permitted.