Agent skill

Wise API

by lineofflight in lineofflight/frankfurter

MITAuto-check passedDevelopment

Install Wise API

skills CLI

$ npx skills add lineofflight/frankfurter --skill wise-api -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install lineofflight/frankfurter wise-api --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/lineofflight/frankfurter.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/querying-wise-api .claude/skills/wise-api && rm -rf skills-src

Use ~/.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/

Paste into Claude Code

Install the "wise-api" agent skill from https://github.com/lineofflight/frankfurter/tree/main/.agents/skills/querying-wise-api into .claude/skills/wise-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wise-api", 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

$skill-installer install https://github.com/lineofflight/frankfurter/tree/main/.agents/skills/querying-wise-api

Type 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.

skills CLI

$ npx skills add lineofflight/frankfurter --skill wise-api -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install lineofflight/frankfurter wise-api --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/lineofflight/frankfurter.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/querying-wise-api .agents/skills/wise-api && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "wise-api" agent skill from https://github.com/lineofflight/frankfurter/tree/main/.agents/skills/querying-wise-api into .agents/skills/wise-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wise-api", 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.

skills CLI

$ npx skills add lineofflight/frankfurter --skill wise-api -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install lineofflight/frankfurter wise-api --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/lineofflight/frankfurter.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/querying-wise-api .cursor/skills/wise-api && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "wise-api" agent skill from https://github.com/lineofflight/frankfurter/tree/main/.agents/skills/querying-wise-api into .cursor/skills/wise-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wise-api", 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

$ gemini skills install https://github.com/lineofflight/frankfurter.git --path .agents/skills/querying-wise-api

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add lineofflight/frankfurter --skill wise-api -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install lineofflight/frankfurter wise-api --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/lineofflight/frankfurter.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/querying-wise-api .gemini/skills/wise-api && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "wise-api" agent skill from https://github.com/lineofflight/frankfurter/tree/main/.agents/skills/querying-wise-api into .gemini/skills/wise-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wise-api", 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.

GitHub CLI

$ gh skill install lineofflight/frankfurter wise-api

Installs 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).

skills CLI

$ npx skills add lineofflight/frankfurter --skill wise-api -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/lineofflight/frankfurter.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/querying-wise-api .github/skills/wise-api && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "wise-api" agent skill from https://github.com/lineofflight/frankfurter/tree/main/.agents/skills/querying-wise-api into .github/skills/wise-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wise-api", 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.

skills CLI

$ npx skills add lineofflight/frankfurter --skill wise-api -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install lineofflight/frankfurter wise-api --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/lineofflight/frankfurter.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/querying-wise-api .opencode/skills/wise-api && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "wise-api" agent skill from https://github.com/lineofflight/frankfurter/tree/main/.agents/skills/querying-wise-api into .opencode/skills/wise-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wise-api", 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: wise-api
GitHub stars: 2k
Token cost: ~1.1k tokens
SKILL.md length: 259 words
Files: 1
Skills in repo: 2
Repo updated: Oct 2, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Querying Wise for exchange rates (real-time
SKILL.md covers Endpoints, Parameters, Response and Rate limit, plus 3 more sections
Calls curl and jq; reaches api.wise.com; needs WISE_API_KEY
Validating Frankfurter rates against Wise mid-market

What it does

Wise API is an agent skill from lineofflight/frankfurter. Use when querying Wise for exchange rates (real-time or historical), validating Frankfurter rates against Wise mid-market, debugging rate discrepancies, or when the user mentions Wise, sanity check, or rate comparison.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development. It works with Ruby. The licence is MIT.

When your agent uses it

Querying Wise for exchange rates (real-time
Validating Frankfurter rates against Wise mid-market
Debugging rate discrepancies
The user mentions Wise

Example prompts

“/wise-api”

Requirements

A credential in WISE_API_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit 71334f7. 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
Shell commands in SKILL.md call:
- curl
- jq
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
- api.wise.com
Also links to:
- docs.wise.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- WISE_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Wise API loads about 1.1k tokens when it runs. Until then it costs about 57 tokens; SKILL.md has 259 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~57
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k

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 lineofflight/frankfurter at commit 71334f7, republished under its MIT licence (© lineofflight). 259 words, ~1,052 tokens.

Download SKILL.mdSave it as .claude/skills/wise-api/SKILL.md (or your agent's skills folder).

name: wise-api
description: Use when querying Wise for exchange rates (real-time or historical), validating Frankfurter rates against Wise mid-market, debugging rate discrepancies, or when the user mentions Wise, sanity check, or rate comparison.

Wise Exchange Rate API

Query real-time and historical mid-market rates from Wise for troubleshooting and data validation.

Endpoints

Base: https://api.wise.com/v1/rates

Current rates

bash

# Single pair
curl -s -H "Authorization: Bearer $WISE_API_KEY" \
  'https://api.wise.com/v1/rates?source=EUR&target=USD' | jq

# All targets for a source (omit target entirely)
curl -s -H "Authorization: Bearer $WISE_API_KEY" \
  'https://api.wise.com/v1/rates?source=EUR' | jq

target only accepts a single currency. Comma-separated lists (target=USD,GBP,JPY) return 400 Bad Request. For multiple pairs from the same source, omit target to get all ~163 currencies in one call and filter the response locally. Loop per-pair only as a last resort.

Historical rate at a specific time

bash

curl -s -H "Authorization: Bearer $WISE_API_KEY" \
  'https://api.wise.com/v1/rates?source=EUR&target=USD&time=2025-06-15T12:00:00' | jq

Historical rate series

bash

curl -s -H "Authorization: Bearer $WISE_API_KEY" \
  'https://api.wise.com/v1/rates?source=EUR&target=USD&from=2025-06-01&to=2025-06-30&group=day' | jq

Parameters

Param	Description	Example
`source`	Source currency (required)	`EUR`
`target`	Single target currency (omit for all)	`USD`
`time`	Single historical timestamp (ISO 8601)	`2025-06-15T12:00:00`
`from`	Period start (date or timestamp)	`2025-06-01`
`to`	Period end (date or timestamp, tz offset ok)	`2025-06-30T23:59:59+0100`
`group`	Grouping interval for series	`day`, `hour`, `minute`

Response

json

[
  {
    "rate": 1.08234,
    "source": "EUR",
    "target": "USD",
    "time": "2025-06-15T12:00:00+0000"
  }
]

Always returns an array. Historical series returns one entry per group interval.

Rate limit

500 requests/minute. Plenty for ad-hoc troubleshooting.

Comparing with Frankfurter

bash

# Frankfurter blended (multi-target OK here)
curl -s 'http://localhost:8080/v2/rates?base=EUR&quotes=USD,GBP,JPY' | jq

# Wise current: one call for all targets, filter locally
curl -s -H "Authorization: Bearer $WISE_API_KEY" \
  'https://api.wise.com/v1/rates?source=EUR' \
  | jq '.[] | select(.target | IN("USD","GBP","JPY"))'

Deviation: abs(frankfurter - wise) / wise * 100

Deviation	Assessment
< 0.1%	Excellent
0.1-0.5%	Acceptable (institutional vs real-time spread)
> 0.5%	Investigate — stale data or provider outlier
> 1.0%	Likely data issue — check individual provider rates

Currency support

Not all currencies work as source. Exotic currencies (MMK, NPR, KGS, etc.) often return 400 Bad Request when used as source. Always use a major currency (EUR, USD, GBP) as source and put the exotic currency in target.

bash

# WRONG — will 400:
curl -s -H "Authorization: Bearer $WISE_API_KEY" \
  'https://api.wise.com/v1/rates?source=MMK&target=USD'

# RIGHT:
curl -s -H "Authorization: Bearer $WISE_API_KEY" \
  'https://api.wise.com/v1/rates?source=USD&target=MMK'

Notes

Wise rates are real-time; Frankfurter rates are daily institutional snapshots. Some spread is normal.
For historical comparison, use time param with the date you're checking, not from/to.
This is for internal validation only, Wise is NOT a Frankfurter provider.
API docs: https://docs.wise.com/api-reference/rate

Files

Just SKILL.md in .agents/skills/querying-wise-api of lineofflight/frankfurter.

Open the folder on GitHubat commit 71334f7

Compare with similar skills

Wise API 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.

Wise API compared with similar skills
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Wise API this skilllineofflight/frankfurter	2k	—	~1.1k	Automated safety check: Pass	MIT	5 days ago
Gumroad Prod Consoleantiwork/gumroad	9.8k	—	~2.9k	Automated safety check: Notes	MIT	today
Breaking Change Analysisruby-git/ruby-git	1.8k	—	~1.7k	Automated safety check: Pass	MIT	5 days ago
Dhhmarckohlbrugge/37signals-skills	724	—	~2.2k	Automated safety check: Pass	None	4 mo ago
Dhh Rails Styledavekilleen/Dex	493	1 repos	~1.7k	Automated safety check: Pass	Custom licence	5 days ago
Ruby Prodavila7/claude-code-templates	32k	7 repos	~445	Automated safety check: Pass	MIT	today

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Questions about Wise API

What does Wise API do?

A skill your agent uses when querying Wise for exchange rates (real-time or historical), validating Frankfurter rates against Wise mid-market, debugging rate discrepancies, or when the user mentions…. Wise API is an agent skill from lineofflight/frankfurter. Use when querying Wise for exchange rates (real-time or historical), validating Frankfurter rates against Wise mid-market, debugging rate discrepancies, or when the user mentions Wise, sanity check, or rate comparison.

When should I use Wise API?

Wise API fits situations like: querying Wise for exchange rates (real-time; validating Frankfurter rates against Wise mid-market; debugging rate discrepancies; the user mentions Wise.

How do I install Wise API in Claude Code?

Run `npx skills add lineofflight/frankfurter --skill wise-api -a claude-code`. Or copy the skill folder (.agents/skills/querying-wise-api in lineofflight/frankfurter) into .claude/skills/wise-api in your project. Claude Code loads it when a task matches its description.

How do I install Wise API in Codex?

Run `npx skills add lineofflight/frankfurter --skill wise-api -a codex`. Or copy the skill folder (.agents/skills/querying-wise-api in lineofflight/frankfurter) into .agents/skills/wise-api in your project. Codex loads it when a task matches its description.

Can I use Wise API 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 lineofflight/frankfurter --skill wise-api -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/wise-api, .gemini/skills/wise-api, .github/skills/wise-api and .opencode/skills/wise-api in your project.

What does Wise API need to run?

Going by SKILL.md and its folder, Wise API needs the command-line tools its instructions call (curl and jq) and credentials named WISE_API_KEY. Our summary lists: A credential in WISE_API_KEY.

Does Wise API access the network?

SKILL.md names 2 domains. In commands or code: api.wise.com; the agent is likely to contact it when it follows the instructions. As links in the text: docs.wise.com. This is read from the text; nothing was executed.

Is Wise API 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 Wise API use?

Wise API is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Wise API use?

About 1.1k tokens (SKILL.md is roughly 4.2k 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 Wise API?

Skills that share tags, products or a category with Wise API: Gumroad Prod Console (antiwork/gumroad, 9.8k stars), Breaking Change Analysis (ruby-git/ruby-git, 1.8k stars), Dhh (marckohlbrugge/37signals-skills, 724 stars) and Dhh Rails Style (davekilleen/Dex, 493 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Wise API?

lineofflight (a GitHub organization) maintains it in lineofflight/frankfurter, which has 1,954 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on October 2, 2026.

Source: lineofflight/frankfurter on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Wise API

Install Wise API

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Wise Exchange Rate API

Endpoints

Current rates

Historical rate at a specific time

Historical rate series

Parameters

Response

Rate limit

Comparing with Frankfurter

Currency support

Notes

Files

Compare with similar skills

Similar skills

Gumroad Prod Console

Breaking Change Analysis

Dhh

Dhh Rails Style

Ruby Pro

Readme Refresh

More from lineofflight/frankfurter

Evaluating Pegs

Questions about Wise API

Install Wise API

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Wise Exchange Rate API

Endpoints

Current rates

Historical rate at a specific time

Historical rate series

Parameters

Response

Rate limit

Comparing with Frankfurter

Currency support

Notes

Files

Compare with similar skills

Similar skills

Gumroad Prod Console

Breaking Change Analysis

Dhh

Dhh Rails Style

Ruby Pro

Readme Refresh

More from lineofflight/frankfurter

Evaluating Pegs

Related

Questions about Wise API