cloudforbots-com Loop Breaker API
The loop-breaker API from cloudforbots-com — 4 operation(s) for loop-breaker.
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OpenAPI Specification
openapi: 3.2.0
info:
title: Cloud for Bots Loop Breaker API
version: 1.0.0
description: 'One API for every Cloud for Bots tool: loop detection, run memory (checkpoint/resume), run budgets, approval rules and scheduled wake-ups for AI agents. **Auth:** `Authorization: Bearer `. Any one of your keys works for every tool. Free keys: https://cloudforbots.com/offer
**Retries:** read actions retry automatically on 502/503/504. Send `Idempotency-Key` to make writes safe to retry. **Limits:** 20 requests/second per key (429 + `Retry-After`). **Webhooks:** signed with `cfb-signature: t=,v1=`, where v1 = HMAC-SHA256(secret, t + "." + raw body). Retries: 1m, 5m, 30m, 2h, 6h. **MCP:** https://cloudforbots.com/mcp (Streamable HTTP). **Status:** https://cloudforbots.com/status
**SDKs:** TypeScript/JS (types) · Python
# Quickstart
Get a free key at cloudforbots.com/offer (one email, keys show right away). Any one of your keys works for every tool. Keep it in an environment variable:
```bash
export CLOUDFORBOTS_API_KEY=mb_your_key_here
```
## TypeScript / JavaScript
No install needed: the SDK is one zero-dependency ES module (Node 18+, Deno, Bun, browsers). ```bash
curl -o cloudforbots.mjs https://cloudforbots.com/sdk/cloudforbots.mjs
curl -o cloudforbots.d.ts https://cloudforbots.com/sdk/cloudforbots.d.ts # types for TypeScript
```
```ts
import { CloudForBots, CloudForBotsError } from "./cloudforbots.mjs";
const cfb = new CloudForBots(); // reads CLOUDFORBOTS_API_KEY
// 1. After each agent step, ask Loop Breaker if the run is stuck
const step = await cfb.loop.checkStep({ run_id: "invoice-run-42", tool: "search_crm", args: { customer: 4471 }, error: "timeout after 30s" });
if (step.halt) throw new Error("Loop detected: " + step.outcome);
// 2. Save progress so a crashed run can resume
await cfb.memory.saveCheckpoint({ run_id: "invoice-run-42", step: "invoice-312", state: { done: 312 } }, { idempotencyKey: "invoice-run-42:312" });
const resume = await cfb.memory.resume({ run_id: "invoice-run-42" });
// 3. Errors carry the HTTP status, type and request id
try { await cfb.approve.checkAction({ action: "delete 40 customer records" }); }
catch (e) { if (e instanceof CloudForBotsError) console.error(e.status, e.type, e.requestId); }
```
## Python
Standard library only (Python 3.8+). ```bash
curl -o cloudforbots.py https://cloudforbots.com/sdk/cloudforbots.py
```
```python
from cloudforbots import CloudForBots, CloudForBotsError
cfb = CloudForBots() # reads CLOUDFORBOTS_API_KEY
step = cfb.loop.check_step(run_id="invoice-run-42", tool="search_crm", args={"customer": 4471}, error="timeout after 30s")
if step.get("halt"):
raise SystemExit("Loop detected: " + step["outcome"])
cfb.memory.save_checkpoint(run_id="invoice-run-42", step="invoice-312", state={"done": 312}, idempotency_key="invoice-run-42:312")
print(cfb.memory.resume(run_id="invoice-run-42"))
try:
cfb.approve.check_action(action="delete 40 customer records")
except CloudForBotsError as e:
print(e.status, e.type, e.request_id)
```
## Webhooks
```python
from cloudforbots import verify_webhook
# Flask example: raw bytes, exactly as received
ok = verify_webhook(WEBHOOK_SECRET, request.headers["cfb-signature"], request.get_data())
```
Register an endpoint with `cfb.webhooks_add("https://you.example/hook", ["loop.halted", "budget.stopped"])` (Python) or `cfb.webhooks.add(url, events)` (JS). The secret is returned once. Rotate it with `cfb.webhooks_rotate(url)`: the old secret keeps working for 24 hours, and during that window `cfb-signature` carries two `v1=` values (`verify_webhook` accepts either). See failed deliveries with `cfb.webhooks_deliveries("failed")` and resend one with `cfb.webhooks_redeliver(id)`. Events: `loop.halted`, `budget.stopped`, `approval.held`, `call.failed`, `key.cap_warning`, `key.cap_reached`, `key.expiring`, `key.expired`. ## MCP
Point any MCP client at `https://cloudforbots.com/mcp` with header `Authorization: Bearer $CLOUDFORBOTS_API_KEY`.'
servers:
- url: https://cloudforbots.com
security:
- bearer: []
tags:
- name: loop-breaker
paths:
/api/v1/loop-breaker/check_step:
post:
operationId: loop_breaker__check_step
tags:
- loop-breaker
summary: check step
description: 'Call AFTER each tool call or agent step with what you just did and whether it failed. Loop Breaker fingerprints the call (tool + normalized args + error) and returns verdict ok, loop_detected or halted. Pro: on a loop, halt=true; stop the run, do not retry, and tell your user what repeated. Free watch-only: never halts, returns would_halt and logs it for the weekly report.'
parameters:
- name: Idempotency-Key
in: header
required: false
schema:
type: string
maxLength: 128
description: Makes the call safe to retry; the same key returns the stored reply for 24h.
- name: X-Request-Id
in: header
required: false
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
run_id:
type: string
description: Any stable id for this agent run, e.g. "nightly-sync-2026-10-15". Use the same id for every step of the run (and its sub-agents).
tool:
type: string
description: The tool or step name you just ran, e.g. "browser.click" or "git push".
args:
description: The arguments you passed (object or string). Volatile values like timestamps and ids are normalized away.
error:
type: string
description: The error message if the step failed. Omit or empty if it succeeded.
max_failures:
type: integer
description: Same failing call this many times = loop. Default 3 (min 2, max 20).
max_repeats:
type: integer
description: Same call this many times in a row (even if it succeeds) = loop. Default 5 (min 3, max 50).
required:
- run_id
- tool
responses:
'200':
description: Tool result (always includes request_id).
headers:
x-request-id:
schema:
type: string
x-ratelimit-remaining:
schema:
type: integer
content:
application/json:
schema:
type: object
additionalProperties: true
'400':
description: Bad JSON
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'401':
description: Missing or bad key
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'403':
description: Key limits (scopes) do not allow this tool or action
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'409':
description: Same Idempotency-Key still running
'422':
description: Idempotency-Key reused on another route
'429':
description: Over 20 requests/second for this key, or free daily limit
headers:
retry-after:
schema:
type: integer
'504':
description: Tool did not answer in time; retry with the same Idempotency-Key
/api/v1/loop-breaker/loop_status:
post:
operationId: loop_breaker__loop_status
tags:
- loop-breaker
summary: loop status
description: Show a run's loops so far, whether it is halted, and its last 10 steps.
parameters:
- name: Idempotency-Key
in: header
required: false
schema:
type: string
maxLength: 128
description: Makes the call safe to retry; the same key returns the stored reply for 24h.
- name: X-Request-Id
in: header
required: false
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
run_id:
type: string
description: Any stable id for this agent run, e.g. "nightly-sync-2026-10-15". Use the same id for every step of the run (and its sub-agents).
required:
- run_id
responses:
'200':
description: Tool result (always includes request_id).
headers:
x-request-id:
schema:
type: string
x-ratelimit-remaining:
schema:
type: integer
content:
application/json:
schema:
type: object
additionalProperties: true
'400':
description: Bad JSON
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'401':
description: Missing or bad key
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'403':
description: Key limits (scopes) do not allow this tool or action
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'409':
description: Same Idempotency-Key still running
'422':
description: Idempotency-Key reused on another route
'429':
description: Over 20 requests/second for this key, or free daily limit
headers:
retry-after:
schema:
type: integer
'504':
description: Tool did not answer in time; retry with the same Idempotency-Key
/api/v1/loop-breaker/weekly_report:
post:
operationId: loop_breaker__weekly_report
tags:
- loop-breaker
summary: weekly report
description: 'Draft a plain-English report of the last 7 days for your key (or IP): runs, loops caught, wasted repeat steps, and the worst offenders. Read-only; sends nothing. Show it to your user.'
parameters:
- name: Idempotency-Key
in: header
required: false
schema:
type: string
maxLength: 128
description: Makes the call safe to retry; the same key returns the stored reply for 24h.
- name: X-Request-Id
in: header
required: false
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
type: object
properties: {}
responses:
'200':
description: Tool result (always includes request_id).
headers:
x-request-id:
schema:
type: string
x-ratelimit-remaining:
schema:
type: integer
content:
application/json:
schema:
type: object
additionalProperties: true
'400':
description: Bad JSON
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'401':
description: Missing or bad key
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'403':
description: Key limits (scopes) do not allow this tool or action
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'409':
description: Same Idempotency-Key still running
'422':
description: Idempotency-Key reused on another route
'429':
description: Over 20 requests/second for this key, or free daily limit
headers:
retry-after:
schema:
type: integer
'504':
description: Tool did not answer in time; retry with the same Idempotency-Key
/api/v1/loop-breaker/usage_and_upgrade:
post:
operationId: loop_breaker__usage_and_upgrade
tags:
- loop-breaker
summary: usage and upgrade
description: 'Show today''s usage for your key or IP and the $49/month All Access upgrade link (cloudforbots.com/offer). Free tier: 500 calls/day. Not metered.'
parameters:
- name: Idempotency-Key
in: header
required: false
schema:
type: string
maxLength: 128
description: Makes the call safe to retry; the same key returns the stored reply for 24h.
- name: X-Request-Id
in: header
required: false
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
type: object
properties: {}
responses:
'200':
description: Tool result (always includes request_id).
headers:
x-request-id:
schema:
type: string
x-ratelimit-remaining:
schema:
type: integer
content:
application/json:
schema:
type: object
additionalProperties: true
'400':
description: Bad JSON
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'401':
description: Missing or bad key
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'403':
description: Key limits (scopes) do not allow this tool or action
content:
application/json:
schema:
type: object
properties:
ok:
type: boolean
const: false
error:
type: object
properties:
type:
type: string
message:
type: string
request_id:
type: string
'409':
description: Same Idempotency-Key still running
'422':
description: Idempotency-Key reused on another route
'429':
description: Over 20 requests/second for this key, or free daily limit
headers:
retry-after:
schema:
type: integer
'504':
description: Tool did not answer in time; retry with the same Idempotency-Key
components:
securitySchemes:
bearer:
type: http
scheme: bearer