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Codex × Covalent: build a multi-chain exception table

A workflow for wallets that span chains: export, compare, and turn obvious gaps into an exception table.

Codex × Covalent — CryptoTax Digest

Use this when the wallet story spans chains. A single export is rarely enough if the user bridged, minted, staked, or moved assets across networks.

The useful output is not a perfect tax answer. It is an exception table: what looks complete, what looks missing, and what needs a human review.

Use this when

  • The same wallet has activity across several chains.
  • You need a reconciliation checklist, not only a CSV.
  • An accountant or analyst needs to see where the uncertainty is.

What the workflow should produce

  • Multi-chain export grouped by network.
  • Exception table for missing transfers, unsupported assets, or suspicious gaps.
  • Chain coverage notes and sample transaction counts.
  • Questions for follow-up with the client or data provider.

Minimum setup

  • Create a GoldRush / Covalent API key or bearer token.
  • Check the current supported-chain documentation and whether the needed endpoint has parity on the selected chains.
  • Use the multi-chain transaction endpoint as the first candidate when the goal is reconciliation, not a single-chain CSV.

Skill to package next

multi-chain-exception-table: input addresses and chains, fetch rows, group by network, compare transaction counts, and output exceptions.csv plus a short review memo.

GoldRush also documents an MCP server for Claude/Cursor-style workflows. That makes the article a good candidate for two tracks: API-key script first, MCP-assisted exploration second.

Check before trusting it

Verify current GoldRush / Covalent naming, endpoints, supported chains, limits, and pricing before a production tutorial. Keep provider data gaps separate from tax interpretation.

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