Agent Registry API C++ Client Library

An idiomatic C++ client library for the Agent Registry API.

Agent Registry is a centralized, unified catalog that lets you store, discover, and govern Model Context Protocol (MCP) servers, tools, and AI agents within Google Cloud.

While this library is GA, please note that the Google Cloud C++ client libraries do not follow Semantic Versioning.

Quickstart

The following shows the code that you'll run in the google/cloud/agentregistry/quickstart/ directory, which should give you a taste of the Agent Registry API C++ client library API.

#include "google/cloud/agentregistry/v1/agent_registry_client.h"
#include "google/cloud/location.h"
#include <iostream>

int main(int argc, char* argv[]) try {
  if (argc != 3) {
    std::cerr << "Usage: " << argv[0] << " project-id location-id\n";
    return 1;
  }

  auto const location = google::cloud::Location(argv[1], argv[2]);

  namespace agentregistry = ::google::cloud::agentregistry_v1;
  auto client = agentregistry::AgentRegistryClient(
      agentregistry::MakeAgentRegistryConnection());

  for (auto r : client.ListAgents(location.FullName())) {
    if (!r) throw std::move(r).status();
    std::cout << r->DebugString() << "\n";
  }

  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;
}

Main classes

The main class in this library is agentregistry_v1::AgentRegistryClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock agentregistry_v1::AgentRegistryClient when testing your application.

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