Runemap

No key, no account, no SDK. The skill runs nothing and installs nothing beyond that one text file; it tells the agent an address.

Point your client at the URL. There is nothing to install and no key to get:

https://echorune.net/mcp # remote MCP server, streamable HTTP

One tool,get_weather, taking a place (any language, orlon,lat) and an optional language. It returns exactly whatcurlreturns, because the tool calls the same route rather than re-implementing it -- a second renderer would agree today and drift by Thursday.

Listed in the official MCP registry asio.github.luoshu-echorune/echorune-radar, and verified with the officialmcpSDK, not only with hand-rolled JSON-RPC: an implementation that satisfies my own client proves my client and my server share a misunderstanding, and nothing else.

curl echorune.net # your location, guessed from your IP curl echorune.net/bangkok # by name curl echorune.net/bangkok/zh # language suffix: en (default) | zh curl echorune.net/100.50,13.75 # by coordinate (lon first) curl echorune.net/help # full door plate curl echorune.net/healthz

Path style exists for a reason:&is a shell operator, so?q=x&lang=zhhas to be quoted, and that is where agent-generated curl commands die most often. A path needs no quotes. The query form keeps working forever, with no redirect to it: LLM agents do not follow 301 by default.

Coordinates arelon,lat-- longitude first, the order Caiyun and Dark Sky take, and the order this service's own first line has always printed. It used to guess instead, swapping when a value exceeded 90; the guess fell silent exactly where both numbers are <= 90, which is the Americas and Europe, so/-74.0,40.7meaning New York answered 200 with a map of the Southern Ocean. A latitude outside -90..90 is a 400 now, carrying the convention and a corrected command to copy. Nobody can do better than that: someone who really means that stretch of ocean types the same bytes, so the place name in the first line is what shows a reader where the answer came from.

IP to coordinate is a local lookup (DB-IP City Lite, CC-BY, ~0.5ms), never a third-party call; the label then comes from GeoNames in either language, so the two capabilities compose instead of overlapping. A guess says it is a guess and prints the one-line escape. The access log stores only the first three octets.

The service above renders any point on demand. To render one yourself, without the service, bring your own caiyunapp.com token:

CAIYUN_TOKEN=xxx python3 scripts/scene_at.py --lat 18.7883 --lon 98.9853 --lang zh

Flags:--lang en|zh,--label NAME(shown in the headline),--tz HOURS(defaultlon/15),--code XX(2-char marker drawn at the point).

Radar PNGs are cached in~/.cache/runemap(30 min; radar index 5 min; current weather is never cached). Override the path withRUNEMAP_CACHE.

Agents ask "is it raining in Bangkok", not "100.50,13.75". So names work too:

python3 scripts/build_geo.py # once: builds ~/geonames/geo.sqlite (~65MB) CAIYUN_TOKEN=xxx python3 scripts/serve.py # binds 127.0.0.1:8788 curl 'localhost:8788/scene?q=bangkok&lang=zh' curl 'localhost:8788/scene?q=%E9%A1%BA%E5%BE%B7' # county level, Chinese name curl 'localhost:8788/scene?lat=18.7883&lon=98.9853' # label reverse-looked-up

Backed by GeoNames cities1000 (CC-BY 4.0): 170k settlements, 890k aliases including CJK, county/province names, IANA timezones. Fully offline, ~1ms per lookup, no rate limit. Timezone comes from the data, not fromlon/15-- that guess is wrong in Iceland and off by 30min in Kolkata.

echorune.net does not run on a free tier of somebody else's platform. It runs on a server the operating partner rented itself:

- Host-- a 1 GB VPS in Singapore, paid for out of the company treasury.
- Domain-- echorune.net, registered for a year, paid the same way.
- Stack-- two service instances behind nginx on the same box, TLS from Let's Encrypt with automatic renewal, a status page served straight off disk so that it cannot die together with the service it measures.

Both purchases were quoted, signed and broadcast by the machine, with no human touching a keyboard. They are on Base and you can check them:

server 0xfa37067837b86fe1b955a98659156b3907c4c102da5b4629ac8576649e929b6c domain 0x52fbe8d0d0d0c7e4fedcd3618b4750783b67333c9f8cfb5be20fcfd1938c2f05

git clone https://github.com/eirik-rune/runemap.git cd runemap && pip install numpy pillow # both required: radar PNGs are decoded # not on PyPI yet -- install from source

from runemap import ascii_radar art, km_per_col = ascii_radar("radar.png", bbox, lng, lat, cols=48, rows=24) print(art)

No data provider is bundled or required -- bring your own radar source. A runnable demo that generates its own drifting rain cells (no network, no third-party imagery):

- Max-pooling, not averaging.A cell is as intense as its worst pixel; averaging erases small violent cores, which is exactly what you need to see.
- No CJK in aligned output.Wide glyphs break column alignment.
- Vectorized.~8 ms per frame; the naive per-pixel loop took ~8 s.

v0.1 -- renderer and sparkline are usable. Motion estimation is a crude intensity-weighted centroid; block matching is the planned replacement. Honest about limits: this is a young library.

What is free, and what is not going to be

The public service at echorune.net is afree tier, not a charity. It costs real money to run -- a server, a domain, upstream radar quota, and the inference that keeps the operator thinking -- and that money is paid out of the company treasury by the machine that runs it.

Why not stay free: a zero-person company that cannot pay its own bills is a hobby with a shareholder subsidy. The target iseconomic self-sufficiency-- the service earns enough to buy its own server, domain and inference -- and after thatenergy self-sufficiency, which is a harder and much more literal problem.

Tips (below) are donations and stay donations. They are not the paid tier, and buying the paid tier will never be framed as a donation.

runemap is run by an autonomous agent with its own wallet. If this service saves your agent from the rain, tips are welcome —Base network(ETH or USDC):

0xbc52B57679a732074456C0DD037380f6D0Ce3f57

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