fittings-time-sunrise-sunset

Original：🇺🇸 English
Translated
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UTC sunrise, sunset, solar noon and day length for a date and coordinate, including polar day/night. Called as GET /v1/time/sunrise-sunset, it takes date, lat, lon and returns sunrise, sunset, dayLengthSeconds. An energy, imaging or scheduling agent needs daylight bounds at a location before it can plan solar yield, a shoot, or a delivery window. Reading this schema and dry-running the call are free and need no wallet; a real call costs $0.003, paid in USDC on Base over x402.

1installs
Sourcefittings-sh/fittings
Added on

NPX Install

npx skill4agent add fittings-sh/fittings fittings-time-sunrise-sunset

Tags

Translated version includes tags in frontmatter
sunrise-sunset-apisolar-time-serviceusdc-paymentx402-protocolapi-endpoint

SKILL.md Content

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Sunrise, sunset and solar noon

time.sunrise-sunset
on 
https://fittings.sh
. One endpoint, deterministic compute.
UTC sunrise, sunset, solar noon and day length for a date and coordinate, including polar day/night.

The call

GET https://fittings.sh/v1/time/sunrise-sunset
FieldTypeRequiredNotes
date
stringyesISO date YYYY-MM-DD
lat
numberyes
lon
numberyes
Example input:
json
{
  "date": "2026-06-21",
  "lat": 51.4779,
  "lon": -0.0015
}

Cost and provenance

Price$0.003
Sourcenone (pure compute)
Licencenone-needed

Why call it rather than answer from memory

An energy, imaging or scheduling agent needs daylight bounds at a location before it can plan solar yield, a shoot, or a delivery window.

Calling it

A skill is loaded on its own, so this document has to be enough by itself. It does not assume the general 
fittings
skill is also loaded. 
call.mjs
ships alongside this file; if it is missing (this document reached you without the rest of the skill), fetch it once with 
curl -sO https://fittings.sh/skill/call.mjs
.
Free, and needs no wallet. Read the schema and see what a call would cost:
bash
curl -s https://fittings.sh/catalog/time.sunrise-sunset | jq
Paying. The endpoint answers 
402 Payment Required
with a signed quote, you sign an authorization, and a facilitator settles it — you never send a transaction and never pay gas. Before it spends anything, the client checks its own hash against the gateway and refuses rather than sign with logic the gateway has moved past:
bash
# Dry run. Prints the quote and pays nothing, because no key is set.
node call.mjs time.sunrise-sunset date=2026-06-21 lat=51.4779 lon=-0.0015

# For real: a wallet holding USDC on Base, and nothing else.
export FITTINGS_PRIVATE_KEY=0x...
node call.mjs time.sunrise-sunset date=2026-06-21 lat=51.4779 lon=-0.0015
Spending is never a side effect of curiosity: with no 
FITTINGS_PRIVATE_KEY
the client fetches the quote and stops. 
FITTINGS_MAX_PRICE
caps what it will pay without asking, and defaults to $0.05.
Use a throwaway wallet holding a few dollars, not a main one. The key sits in plaintext wherever the agent runs, and the whole cost of entry is USDC on Base — no account, no API key, and no ETH, because the payer signs off-chain and the facilitator broadcasts and pays the gas.
Writing your own client instead of using this one? 
@x402/core
and 
@x402/evm
on npm, and the 
fittings
skill records the two things that cost real debugging time: the challenge is in a response header rather than the body, and it must be re-signed from the exact request being retried.
If this is not the right service, 
https://fittings.sh/catalog/search?q=...
searches all of them for free.