Neo4j: REST API Cypher Query to find relationship between two nodes?

The type parameter is listed as {type} but defined as "rtype" in the parameter map. Does that fix it for you? You might try the query without the parameters (just hard code them in), to see if it works.

Maybe you could make it different with the RELATE command: http://docs.neo4j.org/chunked/1.8.M03/query-relate.html.

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