API reference

The daemon serves a JSON HTTP API on 127.0.0.1:4748 (configurable). Authentication: none — the API is loopback-only. UIs and integrations talk to this.

Health & status

GET /api/health

{"ok": true, "port": 4748}

GET /api/status

{
  "sessionId":      "f3a8c2…",
  "taskId":         "t-f3a8c2-1748906412",
  "taskGoal":       "add refund flow to orders service",
  "role":           "developer",
  "activeProvider": "claude",
  "tokensUsed":     74200,
  "graphNodes":     342,
  "handoffsDone":   2,
  "hfsScore":       0.94,
  "hfsHistory":     [0.40, 0.50, …],
  "fsmState":       "RUNNING"
}

Providers

GET /api/providers

Live runtime status per provider (active/standby/exhausted/error).

GET /api/config/providers

Full metadata + install/auth capability flags + probe result.

POST /api/config/providers

Body:

{
  "name":        "claude",
  "enabled":     true,
  "declaredCap": 40000,
  "model":       "qwen2.5-coder:32b",
  "baseUrl":     "http://localhost:11434"
}

Patches [providers.<name>] in relay.toml and reloads.

POST /api/providers/install {name}

Spawns a terminal running the per-OS install command.

POST /api/providers/oauth {name}

Spawns the provider's OAuth subcommand (e.g. claude login).

POST /api/providers/api-key {name, value}

Writes key to .relay/.env, reloads daemon env.

Accounts

Multiple logins per provider (account-aware handoff). Each account is a label plus an isolated config dir; the adapter is pointed at the active account's dir.

POST /api/providers/account {provider, label}

Switch the active account for a provider. The next session (or handoff) uses it.

POST /api/providers/account/add {provider, label, configDir}

Register a login. configDir optional — defaults to an isolated per-label dir.

POST /api/providers/account/remove {provider, label}

Remove a login.

POST /api/providers/account/login {provider, label}

Spawns a terminal running the provider's login flow against that account's config dir.

Accounts are returned inside GET /api/config/providers as accounts: [{label, active, configDir}] + activeAccount.

Detection & adoption

GET /api/detect?sinceHours=<n>

Scan for AI coding agents already running on this machine (process scan + on-disk transcript stores). Default window 24h.

[
  {
    "id":          "claude_6d569909",
    "provider":    "claude",
    "displayName": "Claude Code",
    "surface":     "cli",
    "pid":         14032,
    "running":     true,
    "workDir":     "C:/dev/my-project",
    "account":     "personal",
    "detectedVia": ["process", "transcript"],
    "lastActive":  1752666000,
    "session": {
      "sessionId":      "6d569909…",
      "model":          "claude-sonnet-5",
      "initialPrompt":  "add a refund flow…",
      "plan":           ["…"],
      "tasksRemaining": ["…"],
      "filesTouched":   ["orders/refund.go"],
      "skills":         ["backend-patterns"],
      "mcps":           ["github"],
      "tokensIn":       84210,
      "tokensOut":      12045,
      "messageCount":   37
    }
  }
]

POST /api/detect/adopt {id, target, start}

Lift a detected session's intent into a continuation brief (persisted under .relay/adopted/), targeting provider target. With "start": true also launches a Relay session that continues the work.

Quota wallet

GET /api/quota/wallet

Per provider+account: remaining quota, reset time, live burn rate, and forecast ETA (feeds predictive handoff).

[
  {
    "provider":     "claude",
    "account":      "personal",
    "remaining":    12400,
    "total":        40000,
    "fractionUsed": 0.69,
    "resetsAt":     "2026-07-16T21:00:00Z",
    "source":       "transcript",
    "burnPerMin":   310.5,
    "etaMinutes":   39.9
  }
]

Pipelines

Multi-agent DAGs: one provider+task per node, explicit dependsOn ordering, fallback providers on failure, verify acceptance commands (verifier gate) per node.

GET /api/pipelines

[
  {
    "name": "feature",
    "nodes": [
      {
        "id":        "build",
        "provider":  "claude",
        "task":      "implement the endpoint",
        "dependsOn": [],
        "fallback":  ["codex"],
        "verify":    ["go build ./...", "go test ./..."]
      }
    ]
  }
]

POST /api/pipelines

Saves the full pipeline list (same shape as GET response). Persisted to .relay/pipelines.json.

POST /api/pipelines/run {name}

Executes the pipeline's nodes in dependency order. Honours the single-session guard — errors with "session already running" if one is active.

Time machine

GET /api/history

The handoff timeline, read from the audit log.

[
  {"seq": 3, "ts": "2026-07-16T09:41:03Z", "event": "handoff", "provider": "claude", "summary": "quota breach → codex"}
]

GET /api/history/commits

Snapshot commits on the session branch: [{sha, short, subject, when}].

GET /api/history/diff?sha=<sha>

The diff for one snapshot commit.

POST /api/history/rewind {sha}

Non-destructive rewind: creates a new branch at the snapshot so current work is never lost.

Profiles

GET /api/profiles

[
  {
    "name":        "backend",
    "chain":       ["claude", "codex"],
    "kinds":       ["api", "service"],
    "skills":      ["go", "ts"],
    "contextHint": "production backend services"
  }
]

POST /api/profiles

{
  "name":        "backend",
  "chain":       ["claude", "codex"],
  "kinds":       ["api", "service"],
  "skills":      ["go", "ts"],
  "contextHint": "production backend services",
  "delete":      false
}

Upserts (or deletes when "delete": true).

Session control

POST /api/run {task, threshold, maxHandoffs}

Starts a session in the running daemon. Single-session: 409 if one is already active.

POST /api/handoff

Trigger immediate handoff.

POST /api/session/pause {pause}

Toggle agent execution (cooperative; honoured at event boundaries).

POST /api/session/reply {reply}

Send a stdin reply to the active adapter (if it implements StdinReplier).

GET /api/session/diff

{
  "summary": " orders/refund.go | 42 +++\n orders/routes.go | 18 +-",
  "diff":    "diff --git a/orders/refund.go …"
}

Returns git diff main...relay/<sid> against the user's main branch.

GET /api/session/cost

{
  "sessionUsd": 0.0042,
  "tokensIn":   1820,
  "tokensOut":  411,
  "provider":   "claude"
}

Approvals

GET /api/approvals

Pending requests waiting for user resolution.

[
  {
    "id":        "abc123",
    "action":    "write 250 lines to orders/refund.go",
    "reason":    "exceeds 200-line threshold",
    "severity":  "warn",
    "createdAt": "2026-06-03T15:41:03Z"
  }
]

POST /api/approvals/<id> {approved, note}

Resolve a pending request.

Events stream

GET /api/events?since=<id>

Pull events newer than the given ID:

[
  {"id": 412, "ts": "09:41:27", "tag": "quota",  "msg": "claude: 74% used"},
  {"id": 413, "ts": "09:41:28", "tag": "tool_use", "msg": "Edit orders/routes.go"}
]

Tag values: tool_use, tool_result, text, system, quota, handoff, waiting, error.

WS /ws

WebSocket push of the same events as they happen. Reduces latency from 1500ms (poll) to ~50ms.

Graph & retrieval

GET /api/graph

{"nodes": 342, "edges": 418}

GET /api/graph/detail

Full node + edge list (~200 most recent). Includes module and symbol nodes from the codebase scan plus session-specific decision, constraint, file, do_not_redo nodes from agent activity.

GET /api/graph/project?path=<repo>

One-shot codegraph scan of an arbitrary repo path (no session needed): returns {nodes, edges} of module / symbol nodes. Used by the desktop Graph page's project picker.

GET /api/retrieval?q=<text>&limit=<n>

FTS5 full-text search over indexed code chunks. Default limit 20.

[
  {
    "ID":        "chunk:orders/refund.go:1-40",
    "Path":      "orders/refund.go",
    "Lang":      "go",
    "StartLine": 1,
    "EndLine":   40,
    "Body":      "package orders\n\nimport ...\n\nfunc (s *RefundService) execute(...) error {\n  ...\n}",
    "SHA":       "a3f8c2d4",
    "Dim":       0
  }
]

Used by the MCP relay_retrieve tool. Chunks are populated by the codegraph scanner at session start; future embedding-based ranking will use the embedding blob column.

Audit & contract

GET /api/contract

The current continuation contract as JSON.

GET /api/instructions

Discovered CLAUDE.md / AGENTS.md / Cursor rules + profile skills.

Vision

GET /api/vision/config

POST /api/vision/config

POST /api/vision/probe

See Vision fallback.

Ollama bridge

GET /api/ollama/models?baseUrl=...

Installed models + curated vision pull list.

POST /api/ollama/pull {baseUrl, tag}

Stream-pulls a model from ollama.com. Progress emitted to event log.

POST /api/ollama/launch {provider, model}

Spawns ollama launch <tool> --model <model> in a new terminal.

Observability

GET /api/circuit

Per-provider circuit breaker snapshots.

[
  {"name": "claude", "state": "closed",    "failures": 0},
  {"name": "codex",  "state": "open",      "failures": 3, "openedAt": "..."},
  {"name": "ollama", "state": "half-open", "failures": 0}
]

GET /api/outcomes

Profile success aggregates.

[
  {
    "profile":    "backend",
    "runs":       12,
    "successes":  10,
    "successRate": 0.833,
    "avgTokens":  18420,
    "avgCostUsd": 0.087,
    "lastRun":    "2026-06-03T15:41:03Z"
  }
]

GET /api/redactions

Counts of secrets scrubbed this session.

{"summary": "openai_key:2, env_secret_pair:1"}