Connections & Relations

MCP clients: read references/mcp.md. CLI users: read references/cli.md. Examples below describe shared operation arguments.

Link processes and cards across workflows.

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Key concepts

• Pipe relations define parent/child structure between pipes (who connects to whom, constraints, auto-fill). Use get_pipe_relations on a pipe to list relation IDs and metadata.
• Card relations connect individual cards through an existing pipe relation: pass source_id = the pipe relation's ID (from get_pipe_relations). Default sourceType is PipeRelation; use extra_input (e.g., sourceType: Field) when the API requires a field-based link — see introspect_type on CreateCardRelationInput.
• Table relations in GraphQL are loaded by table-relation ID, not by database table ID: get_table_relations takes a non-empty list of those IDs.
• Connector fields are card fields (connection type), not pipe relations for writes. Prefer update_card + field_updates with operation ADD/REMOVE (related card ids). update_card_field is replace-all of the full id list; get_card value is display titles only — do not rebuild from it. This skill's get_card_relations still reads connector-field links (with card ids). create_card_relation / delete_card_relation write links through a pipe relation and are incremental — pick the surface that matches the link type.

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Tools

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Steps — link two cards via an existing pipe relation

1. Get the pipe relation ID:

   Operation: get_pipe_relations(pipe_id=67890)

   Note the id field on the relation (not the pipe ID).

2. Create the card relation:

   Operation: create_card_relation(parent_id=<PARENT_CARD_ID>, child_id=<CHILD_CARD_ID>, source_id=<PIPE_RELATION_ID>)

3. Verify:

   Operation: get_card_relations(card_id=<CHILD_CARD_ID>)

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Steps — create a new pipe relation

1. Create the relation between two pipes:

   Operation: create_pipe_relation(parent_id=111, child_id=222, name="Support Escalation")

2. Use the relation — cards in the parent pipe can now be linked to cards in the child pipe using create_card_relation.

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Success criteria

• get_pipe_relations returns the new relation with both pipe IDs.
• get_card_relations shows the linked card ID after create_card_relation.

Failure modes

• create_card_relation fails with "relation not found": source_id must be the pipe relation ID (from get_pipe_relations), not the pipe ID. These are different values.
• Table relations return empty: get_table_relations requires table-relation IDs, not table IDs. Get table-relation IDs from the table's connection config.
• Deletion: show the affected relation and obtain approval before removing it.

See also

• pipefy-pipes-and-cards — create the pipes and cards before linking them; connector field updates and update_card_field replace-all live there.
• docs/mcp/tools/identifiers.md — which args expect slug vs numeric id for field and relation tools.
• pipefy-introspection — discover CreateCardRelationInput when non-standard sourceType is needed.