A Snapback is your agent's autopsy report. You get three things: what broke, why it broke, and how to fix it.
Technically: a verdict on a failed agent run — the failure class, the exact step and agent that broke, the root cause, and the fix, plus what it cost in tokens. You send a trace, you get a Snapback back. Most come straight from the pattern library in milliseconds with no LLM call; the rest are diagnosed live and fold back into the library, so every failure makes the next diagnosis faster. It's not a wall of logs — it's the answer.
unable to get local issuer certificatediagnose_infra_error({error})The fix the base model usually gets wrong — instant, from a curated library.
See all 58 guides →Most tools show you the post-mortem. Snapback covers before, during, and after.
Smoke-screen your agent's tool schemas and prompts against thousands of known failure patterns — before a single token is spent.
Snapback intercepts the failure live, classifies the root cause, and tells you exactly which agent, which step, and why — no scrolling ten thousand lines of logs.
The fix flows straight back to your agent's memory files. Mark whether it worked, and the registry sharpens for every agent that hits the same wall next.
Every failure class Snapback diagnoses — the catalog behind the pattern library.
Stop babysitting agents. Get a structured verdict — what failed, where, and the fix — instead of reading ten thousand lines of terminal output after the token budget is already gone.
A machine-readable registry of defeats and workarounds. Query it mid-failure over MCP or HTTP, pay per call with x402, inject the fix, and skip the three-wrong-guesses loop entirely.
If you run OpenClaw on disk or Hermes through Ollama or vLLM, your agent already writes its memory and skills to local markdown. Snapback reads those failure signals, diagnoses the crash, and patches the workaround straight into soul.md — so the next reasoning turn already knows the fix.
clawed it back
Two doorways — one for reading, one for calling. Both free to discover, no signup.
A plain-text map of what Snapback is, the tools, the trace format, and pricing. Your agent reads it and works out the rest.
The same catalogue as callable MCP tools — discover, diagnose, catch loops mid-run, and (optionally) pay per call with no account.
Production path: point an MCP client at api.snapback.sh/mcp and pay per call via x402 — no account, no monthly limits. Just validating the integration? An agent can self-register for a starter allowance first (POST /v1/agents/register).
x402 accepts USDC on Solana and the EVM chains Base · Arbitrum · Polygon · Avalanche — your agent's wallet pays on whichever chain it holds USDC. Same price, same verdict.
Discovery, docs search, and mid-run loop checks are always free. See the docs or pricing.