Frankfurter is an open-source API that provides daily currency exchange rates collected from institutional sources. Developers use it to retrieve currency data, convert amounts, or run their own instance with Docker. The catalogue entries are add-ons for working with the API.
Borrowing it
Nothing to install: this file belongs to lineofflight/frankfurter. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/lineofflight/frankfurter/main/.agents/skills/querying-wise-api/SKILL.mdgit clone --depth 1 https://github.com/lineofflight/frankfurterWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/lineofflight/frankfurter/querying-wise-api)<a href="https://agentmods.dev/skills/lineofflight/frankfurter/querying-wise-api"><img src="https://agentmods.dev/badge/skills/lineofflight/frankfurter/querying-wise-api.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00043 | $0.01119 |
| Opus 5 | $0.00022 | $0.00560 |
| Sonnet 5 | $0.00009 | $0.00224 |
| Haiku 4.5 | $0.00004 | $0.00112 |
Grade A, and why
wise-api scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -H "Authorization: Bearer $WISE_API_KEY" \ How it starts
The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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
# 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
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
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
[
{
"rate": 1.08234,
"source": "EUR",
"target": "USD",
"time": "2025-06-15T12:00:00+0000"
}
]
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 113 lines · 43 tokens per session scan A 7e5ba01400c9
wise-api is a skill published in the GitHub repository lineofflight/frankfurter (1,838 stars, last pushed 5d ago), licensed MIT. It adds 43 tokens to every session and 1,119 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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