API for Managing Link Building Relationships at Scale
CitationBench provides a single REST API with a built-in link CRM, Apollo-powered partner discovery, and outreach automation — purpose-built for agencies running link-building across multiple client brands.
# Discover link-building partners from a competitor's backlink profilePOST /v1/link-building/competitor-outreach> { "competitor_url": "https://rival.com", "workspace_id": "ws_abc123" }job_id: job_9kx4r · status: running · drafts: 50# Track relationship status in the Link-Building CRMlink_building.crm.list> { "X-Workspace-Id": "ws_abc123", "status": "active" }{ "accounts": 24, "relationships": 18, "pending_approval": 6 }Link Building Ops Are Broken by Default
Fragmented tools and manual workflows mean outreach stalls, relationships get lost, and link placements go untracked.
Outreach Dies in Spreadsheets
Without a dedicated CRM, partner relationships and follow-ups scatter across spreadsheets, inboxes, and disconnected tools.
No API Means No Scale
Generic link-building plugins offer no API surface, so custom integrations require months of development work and constant maintenance.
Campaign Visibility Is Zero
Running campaigns across Apollo, Instantly, and a separate CRM means no unified view of replies, placements, or pipeline status.
The fix
One API. CRM. Outreach. Partner Discovery.
CitationBench closes the loop from competitor SERP to signed link partner. One API call triggers Apollo partner discovery, generates 50 personalized outreach drafts via Instantly, and logs every relationship in the built-in link-building CRM.
Every Tool Your Link Building Workflow Needs
CitationBench composes partner discovery, outreach automation, CRM tracking, and campaign management into one REST API with multi-workspace agency support.
Relationship CRM
Link Partner CRM Built Into the API
Track accounts, contacts, relationship status, and communication history via `link_building.crm.*` endpoints. Full lifecycle from first outreach to active link partner, scoped per client workspace.
- Account and contact tracking
- Relationship status lifecycle
- Per-workspace CRM isolation
Outreach Automation
One Keyword to 50 Outreach Drafts
A single `POST /v1/link-building/serp-outreach` call scrapes the SERP, discovers contacts via Apollo, and generates 50 personalized email drafts via Instantly. Bulk-approve before sending.
- Apollo contact discovery
- 50 drafts per keyword
- Bulk approval before send
Competitor Links
Target Sites Linking to Competitors
Seed outreach from a competitor's backlink profile via `link_building.competitor_outreach.create`. Targets domains already linking to rivals, with the same Apollo and Instantly pipeline.
- Competitor backlink seeding
- Personalized draft generation
- Same approval pipeline
Campaign Ops
Unified View Across All Campaigns
Monitor all active SERP and competitor outreach campaigns via `link_building.campaign.list`. Track response rates, pause or resume campaigns, and manage per-campaign email sending across client workspaces.
- Cross-campaign metrics
- Pause and resume controls
- Per-client campaign scoping
Agency Architecture
Manage Every Client From One API Key
A single master API key manages N client workspaces. All link-building calls are scoped per client via the `X-Workspace-Id` header, with full isolation for CRM data, campaigns, and outreach settings.
- Single API key for all clients
- X-Workspace-Id scoping
- Workspace-level CRM isolation
How it works
From sign-up to first call in five minutes.
Sign up and get your key
An `sk_test_*` key lands in your dashboard instantly. No demo gate — start calling real endpoints with shape-complete responses.
Add the MCP server or hit REST
`claude mcp add citationbench https://mcp.citationbench.com/mcp` from Claude Code, Cursor, or any MCP client. Or `curl` against `api.citationbench.com/v1/*` directly.
Run a tool or invoke an agent
Every tool returns shape-complete demo data without auth, so your agent works before the user signs up. Tools across research, production, indexing, link-building, and agents.
Scope to a workspace and ship
Add `X-Workspace-Id: ws_***` to scope per client. Switch to a live `sk_live_*` key when you're ready. Same API surface, same SDK.
Why CitationBench
Built for production, agency-scale, and AI-agent-first.
~35 tools, one MCP server
Hosted at mcp.citationbench.com/mcp. Works with Claude Code, Cursor, Claude Desktop, Windsurf, and ChatGPT Apps. No self-hosting required.
Durable jobs, not fire-and-forget
Every long-running call runs on Cyclonic workers — survives restarts, cancellable, resumable, streams via SSE. Production-safe by default.
Multi-workspace from day one
One master API key, N client workspaces. Switch with a single `X-Workspace-Id` header. Per-client data isolation, bulk ops across all of them.
Demo mode out of the box
Every endpoint responds in shape-complete demo mode without auth, so you can build the agent before the user signs up.
FAQ
Common questions
Start Managing Link Building Relationships via API
One REST API for partner discovery, outreach automation, and CRM tracking across all your client workspaces.
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