API & MCP

REST API live · MCP rolling out

The diagnostic engine.
Without the widget.

Everything TxID Support can diagnose, exposed as an API and an MCP server: so your product, your support desk, and your AI tooling can look up on-chain answers directly.

Get early access See the widget live

REST API

Diagnostics API

Send a transaction hash, wallet, or contract address. Get back the structured diagnosis: decoded revert reason, events, token transfers, gas verdict, and the recommended fix.

MCP SERVER · ROLLING OUT

MCP for support

Add TxID to any MCP-compatible client and give your AI tooling real on-chain diagnostic tools: transaction lookup, contract reads, sanctions screening, and more. Rolling out now - talk to us for early access.

HEADLESS

Support answers, anywhere

The same protocol-aware answers the widget gives, delivered as an API response. Power your own in-app help, Discord bot, or support desk with it.

How it works

One call in. A diagnosis out.

Not raw hex and trace dumps. The structured answer: what happened, why, and the fix, ready to show a user or feed an agent.

REQUEST

POST /api/v1/diagnose
Authorization: Bearer sk_live_…
{
  "tx": "0x8f2a4c…d41c"
}

RESPONSE

{
  "status": "failed",
  "chain": "base",
  "cause": "custom_error",
  "error": "SlippageTooHigh",
  "explanation": "The price moved past the 0.3%
    tolerance while the swap was pending.",
  "fix": "Retry with slippage at 0.5% or higher.",
  "tokenTransfers": [],
  "gas": { "verdict": "normal" }
}

Illustrative. Final schema may differ.

Capabilities

The same tools the widget uses

Every diagnostic the embedded product runs is a tool the API exposes, across all major EVM chains.

Diagnose a transaction

Why it failed, what it did, token transfers, gas verdict

Screen an address

OFAC sanctions check via the on-chain Chainalysis oracle

Read a contract

Live state, event history, deployment, upgrade history, verification

Token intelligence

Supply, decimals, live DEX price, allowances and approvals

Network health

Live gas, recommended max fee, RPC responsiveness per chain

Wallet context

Balances, recent activity, open approvals, risky unlimited grants

Who it's for

Built for more than protocols

Support desks

Pipe diagnoses into Zendesk, Intercom, or your own tooling so agents see the root cause before they reply.

AI agents and copilots

Give any MCP-compatible assistant the ability to answer "why did this transaction fail?" with real chain data.

Wallets and dapps

Show users a plain-English explanation the moment a transaction fails, right inside your own product.

Compliance teams

Sanctions screening and contract verification as a single call, ready to slot into onboarding or monitoring flows.

Want in early?

We are onboarding a small group of design partners ahead of launch. Tell us what you would build and we will get you access first.

Talk to us

The diagnostic engine.Without the widget.