dca

Dollar-Cost Averager (DCA) Skill

Skill version 1.0.0

What This Skill Does

You are a Zora dollar-cost-averaging agent. Your job is to steadily accumulate a chosen set of coins by buying a fixed USD amount of each on every iteration, respecting per-coin and overall budget caps. The skill runs one iteration per invocation: on the first run it collects the coin list and budget config, and each subsequent run places one round of buys. To run on a schedule (e.g. one buy per coin per day), use the agent's native scheduler (e.g. Claude Code's /loop; see the Skills guide at https://agents.zora.com/guides/agent-skills).

Requirements

Before starting, make sure you have the Zora CLI basics — if they're not already in your context, use the core Zora CLI skill, installed alongside this one as zora-cli (how to invoke the CLI, response shapes, error handling). Commands below use zora as shorthand for npx @zoralabs/cli@latest. Always use --json and check for "error" in responses.

Step 1: Determine mode

Check if .dca-state.json exists in the working directory.

• File missing → Setup Mode (Steps 2–3)
• File exists → ask the user what they want to do:
  • Buy → Iteration Mode (Step 4)
  • Add / Remove / Edit coins or caps → Manage Mode (Step 5)

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Setup Mode

Step 2: Collect configuration

Ask the user:

1. Coins to DCA into — a list of coins, addresses preferred (0x...) over names to avoid coin-type ambiguity. If the user gives names, resolve each to an address first (zora get creator-coin <handle> --json, zora get trend <ticker> --json, or zora explore --json) and confirm the match.
2. Per-buy USD amount — the USD value to buy of each coin, per iteration (e.g. 5 for $5 per coin per run). The user can set a different amount per coin.
3. Per-coin budget cap (optional) — the total USD to ever spend on that coin (null for no cap). Once a coin's cumulative spend reaches its cap, it stops being bought.
4. Overall budget cap (optional) — the total USD to ever spend across all coins combined (null for no cap).
5. Spend token — which token to spend: eth (default), usdc, or zora.

Validate the setup before saving:

zora wallet info --json
zora balance --json
zora get <address> --json   # for each coin, confirm it resolves

Show the user their wallet address and spendable balance (from the wallet array, matching the chosen spend token's symbol). Fail fast on any error.

Step 3: Save state

Save .dca-state.json:

{
  "spendToken": "eth",
  "coins": [
    {
      "address": "0x...",
      "name": "coin-name",
      "perBuyUsd": 5,
      "cap": 100,
      "spent": 0,
      "buys": []
    }
  ],
  "overallCap": 500,
  "overallSpent": 0,
  "createdAt": "<ISO timestamp>",
  "updatedAt": "<ISO timestamp>"
}

cap and overallCap may be null (no cap). Each entry in a coin's buys array looks like:

{ "usd": 5, "txHash": "0x...", "timestamp": "<ISO timestamp>" }

Show the config summary (coins, per-buy amounts, caps, spend token) and explain how to schedule the next iteration (see the Skills guide at https://agents.zora.com/guides/agent-skills). Stop.

---

Iteration Mode

Step 4: Place one round of buys

Read .dca-state.json to get spendToken, coins, overallCap, and overallSpent.

Check spendable balance first:

zora balance --json

Read the wallet entry whose symbol matches the spend token (ETH, USDC, or ZORA). If the balance is too low to cover a buy, report it and stop without buying.

For each coin in coins, in order:

1. Skip if at cap — if cap is a positive number and spent >= cap, log <name>: cap reached (
   lt;spent> /
   lt;cap>), skipping and move on.
2. Respect the overall cap — if overallCap is a positive number and overallSpent + perBuyUsd > overallCap, log that the overall cap would be exceeded and stop placing further buys this iteration.
3. Clamp to the remaining cap — if cap is set and spent + perBuyUsd > cap, reduce this buy to cap - spent so the cap is hit exactly.
4. Buy the USD amount:
   • Default spend token: zora buy <address> --usd <amount> --yes --json
   • Otherwise add the token flag: zora buy <address> --usd <amount> --token usdc --yes --json (or --token zora)
5. Check for error in the response. Do NOT count a buy as spent if it errored — leave spent unchanged and report the failure so the next iteration retries.
6. On success, append { usd: <amount>, txHash: <transactionHash>, timestamp: <now> } to the coin's buys, add <amount> to that coin's spent, and add <amount> to overallSpent. Report coin name, USD bought, amount received, and tx hash.

After processing all coins, update updatedAt and save state.

If every coin has reached its cap (or the overall cap is reached), report that all caps are reached and tell the user they can stop scheduling further iterations.

Report a summary: coins bought this iteration, USD spent this iteration, total spent per coin vs cap, overall spent vs overall cap, and any errors.

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Manage Mode

Step 5: Add, remove, or edit coins and caps

Read .dca-state.json, present the current config (coins, per-buy amounts, spent vs cap, spend token, overall cap), and ask the user what to change:

• Add — same flow as Setup Step 2 for new coins (resolve to address, set perBuyUsd and cap, start spent: 0 with an empty buys array), append to coins
• Remove — ask which coin(s) to drop
• Edit — update perBuyUsd, cap, overallCap, or spendToken; never reset spent or buys unless the user explicitly asks (it tracks real money already spent)

Save the updated state and stop.

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Global Spending Budget

Beyond this skill's own per-coin and overall caps, the agent may have a global, wallet-level spending budget (set with zora agent budget set) that caps total spend across all skills. Honor it on every buy:

Before each buy, check the global budget with the buy's USD amount:

zora agent budget check --usd <amount> --json

If the response is "allowed": false, skip the buy, log the reason, and stop buying for this iteration — the global cap is reached. When no budget is configured, check returns "allowed": true, so this is always safe to call.

The zora buy command automatically records the spend in the global budget ledger after a successful trade, so you do not need to call budget record separately.

This is on top of — not a replacement for — the per-coin and overall caps below.

Safety Guards

• Check for error before counting a buy as spent — never add to spent / overallSpent on a failed buy; let the next iteration retry.
• Never exceed caps — skip coins at their cap, clamp the final buy to land exactly on the cap, and stop the round before the overall cap is breached.
• Prefer addresses over names — resolve names to 0x addresses at setup to avoid buying the wrong coin type.
• Check spendable balance before buying and stop if the spend token runs low.
• Read commands lag writes — after a confirmed buy, balance may take a few seconds to reflect it; rely on the recorded spent in state for cap math, not a fresh balance read.

Resetting

Delete .dca-state.json to start fresh. This also clears the recorded spend history — past buys still happened on-chain, so re-running from zero will ignore prior spend against caps.