Add MCP server endpoint at /mcp with JWT auth#75
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Expose an MCP (Model Context Protocol) Streamable HTTP endpoint that lets LLM agents query fetch-api's GraphQL surface via the standard MCP transport. Shares the same JWT + claim-injection middleware chain as /query. - schema/mcp.graphqls: @mcptool / @mcpExample / @mcpHide directives - schema/base.graphqls: annotate the 5 read queries with @mcptool - internal/graph/mcp_tools_gen.go: generated via server-garage mcpgen - internal/app/app.go: build MCPHandler alongside GraphQL handler, share gqlgen.ExecutableSchema between the two - cmd/fetch-api/main.go: mount /mcp on the HTTP mux - go.mod: pull in modelcontextprotocol/go-sdk v1.4.1; bump gqlgen to match server-garage
gqlgen 0.17.89 auto-maps cloudevent.CloudEventHeader.RawEventID (json:"raweventid") to the schema's nullable raweventid field, so the custom CloudEventHeaderResolver stub is no longer needed.
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Summary
/mcpso LLM agents can query fetch-api's GraphQL surface via the standard MCP transport./mcpreuses the same middleware chain as/query(PanicRecovery → Logger → RequestTimeout → CheckJWT → AddClaimHandler), so authorization + DID scoping are identical.@mcpTooland surfaced via server-garage'smcpgencodegen:fetch_get_latest_index,fetch_list_indexes,fetch_get_latest_cloud_event,fetch_list_cloud_events,fetch_list_available_event_types.Why draft
Depends on server-garage v0.1.0 (DIMO-Network/server-garage#31). Once that tag lands, this PR needs:
replace github.com/DIMO-Network/server-garage => /Users/zer0stars/workspace/server-garagefromgo.modgithub.com/DIMO-Network/server-garage v0.1.0go mod tidyNotable changes
schema/mcp.graphqls— new: defines@mcpTool/@mcpExample/@mcpHidedirectives.schema/base.graphqls— annotate read queries with@mcpTool.internal/graph/mcp_tools_gen.go— generated bymcpgen; exportsMCPTools+CondensedSchema.internal/graph/resolver.go—//go:generaterunsmcpgen.internal/app/app.go— buildsMCPHandlerusingmcpserver.New(…, NewGQLGenExecutor(es), …)with the same auth chain; shares the gqlgenExecutableSchemawith/query.cmd/fetch-api/main.go—mux.Handle("/mcp", application.MCPHandler).internal/graph/base.resolvers.go— implement newRaweventidresolver stub emitted after gqlgen bump (non-pointer Go field, nullable schema field).gqlgen.yml—mcpTool/mcpExamplemarkedskip_runtime.Test plan
go build ./...go test ./...go mod tidyclean; CI green (generate/lint/tests/install-tools)POST /mcptools/listreturns 5 tools;tools/call fetch_get_latest_indexwith a valid vehicle JWT returns a CloudEventIndex; unauthenticated request returns 401https://fetch-api.dev.dimo.zone/mcpwithtools/list