NoLimitNodesDocs
Program Streams

Program Streams ListTopics

List every Program Stream topic visible to your credential.

ListTopics returns the active catalog for your account.

Request

message ListTopicsRequest {}

Response

message ListTopicsResponse {  repeated TopicInfo topics = 1;} message TopicInfo {  string name = 1;  string description = 2;  string proto_message_type = 3;}

grpcurl

grpcurl \  -H "x-api-key: YOUR_API_KEY" \  -import-path . \  -proto program-streams.proto \  -d '{}' \  events.nln.clr3.org:443 \  nln.stream.v1.StreamService/ListTopics

Filter in Python

response = client.ListTopics(    pb.ListTopicsRequest(),    metadata=[("x-api-key", "YOUR_API_KEY")],) pump_topics = [    topic    for topic in response.topics    if topic.name.startswith("solana.pump_fun.")] for topic in pump_topics:    print(topic.name, topic.proto_message_type)

Cache policy

  • Refresh at startup.
  • Refresh after NOT_FOUND or PERMISSION_DENIED.
  • Store topic names as configuration, not source constants.
  • Compare catalog changes before deployment.

Browse the same inventory in the Program Streams catalog.