Alpaca CLI
alpacahq/cli
Install, configure, and use the Alpaca CLI - a command-line tool for the Alpaca Trading API.
Handle money and numeric precision correctly with the Alpaca API — numbers-as-strings on the wire, decimals vs floats, rounding/truncation before sending amounts, fractional-share precision, and…
Install Alpaca Broker Money Precision
$ npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install alpacahq/alpaca-skills alpaca-broker-money-precision --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/alpacahq/alpaca-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/broker-api/money-precision .claude/skills/alpaca-broker-money-precision && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "alpaca-broker-money-precision" agent skill from https://github.com/alpacahq/alpaca-skills/tree/main/skills/broker-api/money-precision into .claude/skills/alpaca-broker-money-precision/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "alpaca-broker-money-precision", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/alpacahq/alpaca-skills/tree/main/skills/broker-api/money-precisionType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install alpacahq/alpaca-skills alpaca-broker-money-precision --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/alpacahq/alpaca-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/broker-api/money-precision .agents/skills/alpaca-broker-money-precision && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "alpaca-broker-money-precision" agent skill from https://github.com/alpacahq/alpaca-skills/tree/main/skills/broker-api/money-precision into .agents/skills/alpaca-broker-money-precision/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "alpaca-broker-money-precision", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install alpacahq/alpaca-skills alpaca-broker-money-precision --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/alpacahq/alpaca-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/broker-api/money-precision .cursor/skills/alpaca-broker-money-precision && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "alpaca-broker-money-precision" agent skill from https://github.com/alpacahq/alpaca-skills/tree/main/skills/broker-api/money-precision into .cursor/skills/alpaca-broker-money-precision/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "alpaca-broker-money-precision", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/alpacahq/alpaca-skills.git --path skills/broker-api/money-precision--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install alpacahq/alpaca-skills alpaca-broker-money-precision --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/alpacahq/alpaca-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/broker-api/money-precision .gemini/skills/alpaca-broker-money-precision && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "alpaca-broker-money-precision" agent skill from https://github.com/alpacahq/alpaca-skills/tree/main/skills/broker-api/money-precision into .gemini/skills/alpaca-broker-money-precision/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "alpaca-broker-money-precision", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install alpacahq/alpaca-skills alpaca-broker-money-precisionInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/alpacahq/alpaca-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/broker-api/money-precision .github/skills/alpaca-broker-money-precision && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "alpaca-broker-money-precision" agent skill from https://github.com/alpacahq/alpaca-skills/tree/main/skills/broker-api/money-precision into .github/skills/alpaca-broker-money-precision/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "alpaca-broker-money-precision", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install alpacahq/alpaca-skills alpaca-broker-money-precision --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/alpacahq/alpaca-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/broker-api/money-precision .opencode/skills/alpaca-broker-money-precision && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "alpaca-broker-money-precision" agent skill from https://github.com/alpacahq/alpaca-skills/tree/main/skills/broker-api/money-precision into .opencode/skills/alpaca-broker-money-precision/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "alpaca-broker-money-precision", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
alpaca-broker-money-precision- GitHub stars
- 154
- Token cost
- ~1.2k tokens
- SKILL.md length
- 546 words
- Files
- 2
- Skills in repo
- 14
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Handle money and numeric precision correctly with the Alpaca API — numbers-as-strings on the wire, decimals vs floats, rounding/truncation before sending amounts, fractional-share precision, and…
- Works in 6 steps: Numbers come as strings — keep them that… → Round/truncate before sending — and know… → Fractional shares → …
- Handling monetary amounts
- SKILL.md covers 1. Numbers come as strings —…, 2. Round/truncate before…, 3. Fractional shares and 4. Storage, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Alpaca Broker Money Precision is an agent skill from alpacahq/alpaca-skills. Handle money and numeric precision correctly with the Alpaca API — numbers-as-strings on the wire, decimals vs floats, rounding/truncation before sending amounts, fractional-share precision, and safe DB storage. Use when handling monetary amounts, order quantities, or prices in any Alpaca integration in any language.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `reference.md`).
It sits in Business, Finance & HR. It works with Alpaca. The repository describes itself as: Agent skills for Alpaca's Trading API and Broker API: drop-in SKILL.md files for AI coding assistants. The licence is Apache-2.0.
When your agent uses it
- Handling monetary amounts
- Order quantities
- Prices in any Alpaca integration in any language
Example prompts
- “/alpaca-broker-money-precision”
Requirements
- Python 3
Workflow steps
6 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 39111ab. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Alpaca Broker Money Precision loads about 1.2k tokens when it runs. Until then it costs about 87 tokens; SKILL.md has 546 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from alpacahq/alpaca-skills at commit 39111ab, republished under its Apache-2.0 licence (© alpacahq). 546 words, ~1,169 tokens.
Download SKILL.mdSave it as
.claude/skills/alpaca-broker-money-precision/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- alpaca-broker-money-precision
- description
- Handle money and numeric precision correctly with the Alpaca API — numbers-as-strings on the wire, decimals vs floats, rounding/truncation before sending amounts, fractional-share precision, and safe DB storage. Use when handling monetary amounts, order quantities, or prices in any Alpaca integration in any language.
Alpaca — Money & Numeric Precision
Financial bugs are silent and expensive. Alpaca's wire format and the realities of decimal arithmetic create a few specific traps. This skill is short, opinionated, and language-agnostic.
Read
alpaca-broker-integrationfirst.
1. Numbers come as strings — keep them that way
Alpaca returns prices, quantities, notional, and money amounts as JSON strings ("100.50", "1.5", "190.2345"), and accepts them as strings on the way in. This is deliberate: it avoids the precision loss of JSON's binary floats.
Rule: parse string money fields into a decimal type, never a binary float/double. Serialize back to a string. Don't let a number ever live as an IEEE-754 float in the money path.
| Language | Use | Avoid |
|---|---|---|
| Python | decimal.Decimal("100.50") | float("100.50") |
| TypeScript/JS | a decimal lib (decimal.js/big.js) or string arithmetic | Number(...), parseFloat |
| Go | shopspring/decimal | float64 for accumulation |
| Java/Kotlin | java.math.BigDecimal | double |
Real-world caveat: not every Alpaca endpoint is consistent — some market-data numeric fields come as JSON numbers (e.g. bar OHLC). Prices for display/analytics can tolerate floats; money you move or store must not. Know which field you're touching.
2. Round/truncate before sending — and know the direction
Alpaca generally accepts 2 decimal places for cash amounts and up to 9 for fractional share qty/notional. If you send more precision than allowed, you risk rejection or silent rounding on their side.
Rule: explicitly round/truncate to the target precision before the API call, using a deliberate rounding mode.
- For money you're moving out / charging, truncate (round down) to 2 dp so you never move more than intended. (e.g.
floor(amount * 100) / 100.) - Pick the rounding mode consciously (
ROUND_DOWNvsROUND_HALF_UP) — don't inherit whatever the default float formatting does. - Re-round after every arithmetic step that could reintroduce precision (e.g. computing
amount * percentagefor a split allocation), not just at the end.
# splitting a deposit across holdings — round each slice down, track remainder
slice = truncate(total * (pct / 100), 2)3. Fractional shares
qtyandnotionalsupport up to 9 decimal places.qtyXORnotional— never both (seealpaca-broker-trading-orders).- Don't reconstruct
qtyfromnotional / priceand send it — passnotionaland let Alpaca compute the fill. Round-tripping through a price you fetched introduces drift.
Show full SKILL.md (213 more words)Show less
4. Storage
- Store money in your DB as fixed-point decimal, not float. A practical pattern is generous precision/scale, e.g.
DECIMAL(20, 8)— wide enough for multi-currency and fractional, with headroom beyond Alpaca's 2-dp cash so you never lose data you received. - Store what Alpaca sent verbatim alongside any converted/derived values. If you truncate to 2 dp for the API call but received more precision back, keep both — it makes reconciliation and audits possible.
- Keep an explicit currency column; Alpaca is multi-currency on some rails (funding wallet) even though most is USD.
5. Multi-currency notes
- Most Broker/trading flows are USD; journals default to USD.
- The funding wallet rail supports many currencies (
USD,EUR,JPY, …) and carries FX fees. When you touch it, never assume USD — read and store thecurrency, and treat FX amounts as decimals end-to-end.
6. Checklist
- Money fields parsed from strings into a decimal type; serialized back to strings.
- No binary floats anywhere in the move-money path.
- Amounts rounded/truncated to the allowed precision before the call, with an intentional rounding mode (round down for outgoing money).
- Re-round after each intermediate computation.
- DB columns are fixed-point decimal with headroom; raw Alpaca values stored verbatim.
- Explicit currency tracked.
Related skills: order qty/notional rules → alpaca-broker-trading-orders; journal/transfer amounts → alpaca-broker-journals, alpaca-broker-funding-transfers; reconciling stored vs Alpaca values → alpaca-broker-reconciliation-idempotency.
© alpacahq, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in skills/broker-api/money-precision of alpacahq/alpaca-skills.
- SKILL.md
- reference.md
Open the folder on GitHubat commit 39111ab
Compare with similar skills
Alpaca Broker Money Precision next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Alpaca Broker Money Precision this skillalpacahq/alpaca-skills | 154 | — | ~1.2k | Automated safety check: Pass | Apache-2.0 | |
| Alpaca CLIalpacahq/cli | 178 | — | ~2.6k | Automated safety check: Pass | Apache-2.0 | |
| Alpaca Tradinggauss314/skills | 248 | — | ~2.4k | Automated safety check: Pass | MIT | |
| Alpacazapier/connectors | 177 | — | ~4.6k | Automated safety check: Pass | Elastic-2.0 | |
| Technical Analysttradermonty/claude-trading-skills | 3k | 4 repos | ~4.6k | Automated safety check: Pass | MIT | |
| Theme Detectortradermonty/claude-trading-skills | 3k | 2 repos | ~4.9k | Automated safety check: Pass | MIT |
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Questions about Alpaca Broker Money Precision
What does Alpaca Broker Money Precision do?
Handle money and numeric precision correctly with the Alpaca API — numbers-as-strings on the wire, decimals vs floats, rounding/truncation before sending amounts, fractional-share precision, and…. Alpaca Broker Money Precision is an agent skill from alpacahq/alpaca-skills. Handle money and numeric precision correctly with the Alpaca API — numbers-as-strings on the wire, decimals vs floats, rounding/truncation before sending amounts, fractional-share precision, and safe DB storage.
When should I use Alpaca Broker Money Precision?
Alpaca Broker Money Precision fits situations like: handling monetary amounts; order quantities; prices in any Alpaca integration in any language.
How do I install Alpaca Broker Money Precision in Claude Code?
Run `npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a claude-code`. Or copy the skill folder (skills/broker-api/money-precision in alpacahq/alpaca-skills) into .claude/skills/alpaca-broker-money-precision in your project. Claude Code loads it when a task matches its description.
How do I install Alpaca Broker Money Precision in Codex?
Run `npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a codex`. Or copy the skill folder (skills/broker-api/money-precision in alpacahq/alpaca-skills) into .agents/skills/alpaca-broker-money-precision in your project. Codex loads it when a task matches its description.
Can I use Alpaca Broker Money Precision in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add alpacahq/alpaca-skills --skill alpaca-broker-money-precision -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/alpaca-broker-money-precision, .gemini/skills/alpaca-broker-money-precision, .github/skills/alpaca-broker-money-precision and .opencode/skills/alpaca-broker-money-precision in your project.
What does Alpaca Broker Money Precision need to run?
SKILL.md names no scripts, command-line tools or credentials: Alpaca Broker Money Precision is instructions for the agent only. Our summary lists: Python 3.
Does Alpaca Broker Money Precision access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Alpaca Broker Money Precision safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Alpaca Broker Money Precision use?
Alpaca Broker Money Precision is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Alpaca Broker Money Precision use?
About 1.2k tokens (SKILL.md is roughly 4.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Alpaca Broker Money Precision?
Skills that share tags, products or a category with Alpaca Broker Money Precision: Alpaca CLI (alpacahq/cli, 178 stars), Alpaca Trading (gauss314/skills, 248 stars), Alpaca (zapier/connectors, 177 stars) and Technical Analyst (tradermonty/claude-trading-skills, 3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Alpaca Broker Money Precision?
alpacahq (a GitHub organization) maintains it in alpacahq/alpaca-skills, which has 154 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on September 8, 2026.
Source: alpacahq/alpaca-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.