{"id":49820170,"url":"https://github.com/ing-bank/envoy-mcp-openapi-processor","last_synced_at":"2026-05-13T10:04:33.940Z","repository":{"id":353371804,"uuid":"1203710842","full_name":"ing-bank/envoy-mcp-openapi-processor","owner":"ing-bank","description":"An Envoy external processor that transforms Model Context Protocol (MCP) requests into upstream HTTP API calls based on OpenAPI specifications.","archived":false,"fork":false,"pushed_at":"2026-04-23T15:20:47.000Z","size":59,"stargazers_count":2,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2026-04-23T17:26:40.553Z","etag":null,"topics":["envoy","mcp","mcp-server","openapi"],"latest_commit_sha":null,"homepage":"","language":"Go","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/ing-bank.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-04-07T09:49:36.000Z","updated_at":"2026-04-23T15:21:04.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/ing-bank/envoy-mcp-openapi-processor","commit_stats":null,"previous_names":["ing-bank/envoy-mcp-openapi-processor"],"tags_count":null,"template":false,"template_full_name":null,"purl":"pkg:github/ing-bank/envoy-mcp-openapi-processor","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ing-bank%2Fenvoy-mcp-openapi-processor","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ing-bank%2Fenvoy-mcp-openapi-processor/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ing-bank%2Fenvoy-mcp-openapi-processor/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ing-bank%2Fenvoy-mcp-openapi-processor/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/ing-bank","download_url":"https://codeload.github.com/ing-bank/envoy-mcp-openapi-processor/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ing-bank%2Fenvoy-mcp-openapi-processor/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":32977314,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-13T06:31:55.726Z","status":"ssl_error","status_checked_at":"2026-05-13T06:31:51.336Z","response_time":115,"last_error":"SSL_read: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["envoy","mcp","mcp-server","openapi"],"created_at":"2026-05-13T10:04:31.314Z","updated_at":"2026-05-13T10:04:33.932Z","avatar_url":"https://github.com/ing-bank.png","language":"Go","funding_links":[],"categories":[],"sub_categories":[],"readme":"# envoy-mcp-openapi-processor\n\nAn [Envoy external processor](https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_filters/ext_proc_filter) \nthat transforms [Model Context Protocol (MCP)](https://modelcontextprotocol.io/) requests into upstream HTTP API calls \nbased on [OpenAPI](https://www.openapis.org/) specifications.\n\n\nThe external processor server communicates only with Envoy over gRPC via a Unix domain socket. Envoy owns all \ndownstream client and upstream service connections, while the processor inspects and can mutate request and response \ndata relayed by Envoy.\n\n## Installation\n\n```sh\ngo get github.com/ing-bank/envoy-mcp-openapi-processor\n```\n\n## Quick Start\n\nSee [`examples/mcp-server`](examples/mcp-server) for a complete working example including Envoy proxy configured to use the\n`envoy-mcp-openapi-processor` server.\n\n## OpenTelemetry\n\nTo enable export of logs and traces to an OpenTelemetry collector, use one of the options below. If neither is used, the server runs with a no-op tracer provider and a no-op logger.\n\n### Option 1: Use provided initialization functions\n\n```go\npackage main\n\nimport (\n\t\"context\"\n\n\tmcp_proc \"github.com/ing-bank/envoy-mcp-openapi-processor\"\n)\n\nfunc main() {\n\ttelemetryConfig := mcp_proc.TelemetryConfig{\n\t\tOtelEndpoint:   \"otel-collector:4317\",\n\t\tServiceName:    \"mcp-sidecar\",\n\t\tServiceVersion: \"1.0.0\",\n\t}\n\tctx := context.Background()\n\terr := mcp_proc.InitLogger(telemetryConfig)\n\t// ...\n\ttracerShutdown, err := mcp_proc.InitTracer(ctx, telemetryConfig)\n\t// ...\n\tvar cfg mcp_proc.Config\n\t// ...\n\tmcp_proc.RunServer(ctx, \u0026cfg)\n}\n```\n\n### Option 2: Bring your own provider\n\nSet the global tracer provider by calling `otel.SetTracerProvider(myTracerProvider)` and the global zap logger by calling `zap.ReplaceGlobals(myLogger)` before starting the server.\n\n## Development\n\n### Tests\n\nTo run all tests, execute the following command:\n\n```sh\nmake test\n```\n\nTo check the test coverage, execute the following command:\n\n```sh\nmake coverage-check\n```\n\n### Fuzz tests\n\nRun server handler fuzz tests one at a time:\n\n```sh\nmake fuzz-request\n```\n\n```sh\nmake fuzz-response\n```\n\nEach command runs until stopped with `Ctrl+C` and reports any issues found.\n\n\n## Security Checklist\n\nBefore deploying to production, we advise to verify if the following controls are in place\n\n### Container Security\n\n- [ ] Container runs as non-root user\n- [ ] Read-only root filesystem where possible\n- [ ] No privileged mode\n- [ ] Resource limits (CPU, memory) configured\n- [ ] seccomp profile applied\n- [ ] AppArmor/SELinux enabled\n- [ ] Container image scanned for CVEs\n- [ ] Image signed and verified\n\n### Envoy Configuration\n\n- [ ] TLS configured for downstream connections\n- [ ] TLS configured for upstream connections\n- [ ] Buffer limits set (≤32KB for edge deployments)\n- [ ] Connection limits configured\n- [ ] Stream limits configured (≤100 concurrent for HTTP/2)\n- [ ] Timeouts configured (connection, stream, request)\n- [ ] Overload manager enabled\n- [ ] Admin endpoint restricted to localhost\n- [ ] `use_remote_address: true` for edge deployments\n- [ ] Path normalization enabled\n- [ ] `headers_with_underscores_action: REJECT_REQUEST`","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fing-bank%2Fenvoy-mcp-openapi-processor","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fing-bank%2Fenvoy-mcp-openapi-processor","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fing-bank%2Fenvoy-mcp-openapi-processor/lists"}