A prediction market's week as an image

bash
API=https://beta-api.b3os.orgAUTH="Authorization: Bearer $B3OS_API_KEY"act() { curl -s "$API/v1/actions/call" -H "$AUTH" -H "Content-Type: application/json" \  -d "$(jq -n --arg ref "$1" --argjson input "$2" '{ref: $ref, input: $input}')"; }act io.b3os/polymarket/search@1 '{"query": "bitcoin", "limit": 20}' > found.jsonjq '[.output.events[].markets[] | select(.closed == false and .outcomes == ["Yes","No"]      and .outcome_prices[0] >= 0.05 and .outcome_prices[0] <= 0.95)]    | sort_by(-(.volume_24h // 0)) | .[0]' found.json > market.jsonjq -r .question market.jsonact io.b3os/polymarket/get-price-history@1 \  "$(jq '{token_id: .token_ids[0], interval: "1w", fidelity_minutes: 360}' market.json)" > history.jsonjq '.output.history | {points: length, first: .[0].p, last: .[-1].p}' history.jsonjq -n --slurpfile m market.json --slurpfile h history.json '{  model: "b3os/qwen3.5-9b", temperature: 0, max_tokens: 80, chat_template_kwargs: {enable_thinking: false},  messages: [    {role: "system", content: "Write one sentence of at most 28 words describing how a prediction market'"'"'s Yes price moved this week. Use only the facts given. No advice, no forecast, no opinion."},    {role: "user", content: ({question: $m[0].question, yes_price_now: $h[0].output.history[-1].p,                              yes_price_a_week_ago: $h[0].output.history[0].p} | tojson)}]}' \| curl -s "$API/v1/infer/chat/completions" -H "$AUTH" -H "Content-Type: application/json" -d @- \| jq -r '.choices[0].message.content' > brief.txtjq -n --rawfile b brief.txt --slurpfile m market.json '{  html: ("<body style=\"margin:0;background:#0d1117;color:#e6edf3;font:24px system-ui;padding:48px\"><h1>"         + $m[0].question + "</h1><p>" + $b + "</p></body>"),  viewport: {width: 1120, height: 480}, full_page: true,  style: {background: "midnight", frame: "none"}, format: "webp"}' \| curl -s "$API/v1/render/screenshots" -H "$AUTH" -H "Content-Type: application/json" -d @- \| jq -r '.artifacts[0].url' | xargs curl -s -o card.webp

The recipe's run.mjs draws the full card: the price, the change and the week as an SVG line.

ts
const API = "https://beta-api.b3os.org";const headers = { authorization: `Bearer ${process.env.B3OS_API_KEY}`, "content-type": "application/json" };const post = async (path: string, body: unknown): Promise<any> =>  (await fetch(`${API}${path}`, { method: "POST", headers, body: JSON.stringify(body) })).json();const act = (ref: string, input: unknown) => post("/v1/actions/call", { ref, input });const found = await act("io.b3os/polymarket/search@1", { query: "bitcoin", limit: 20 });const market = found.output.events  .flatMap((e: any) => e.markets)  .filter((m: any) => !m.closed && m.outcomes.join() === "Yes,No" && m.outcome_prices[0] >= 0.05 && m.outcome_prices[0] <= 0.95)  .sort((a: any, b: any) => (b.volume_24h ?? 0) - (a.volume_24h ?? 0))[0];const { output } = await act("io.b3os/polymarket/get-price-history@1", {  token_id: market.token_ids[0],  interval: "1w",  fidelity_minutes: 360,});const now = output.history.at(-1).p;const before = output.history[0].p;const chat = await post("/v1/infer/chat/completions", {  model: "b3os/qwen3.5-9b",  temperature: 0,  max_tokens: 80,  chat_template_kwargs: { enable_thinking: false },  messages: [    { role: "system", content: "Write one sentence of at most 28 words describing how a prediction market's Yes price moved this week. Use only the facts given. No advice, no forecast, no opinion." },    { role: "user", content: JSON.stringify({ question: market.question, yes_price_now: now, yes_price_a_week_ago: before }) },  ],});const brief = chat.choices[0].message.content;const shot = await post("/v1/render/screenshots", {  html: `<body style="margin:0;background:#0d1117;color:#e6edf3;font:24px system-ui;padding:48px"><h1>${market.question}</h1><p>${brief}</p></body>`,  viewport: { width: 1120, height: 480 },  full_page: true,  style: { background: "midnight", frame: "none" },  format: "webp",});console.log(shot.artifacts[0].url);

python
import jsonimport osimport requestsAPI = "https://beta-api.b3os.org"s = requests.Session()s.headers["Authorization"] = f"Bearer {os.environ['B3OS_API_KEY']}"act = lambda ref, inp: s.post(f"{API}/v1/actions/call", json={"ref": ref, "input": inp}).json()found = act("io.b3os/polymarket/search@1", {"query": "bitcoin", "limit": 20})markets = [m for e in found["output"]["events"] for m in e["markets"]           if not m["closed"] and m["outcomes"] == ["Yes", "No"] and 0.05 <= m["outcome_prices"][0] <= 0.95]market = max(markets, key=lambda m: m.get("volume_24h") or 0)history = act("io.b3os/polymarket/get-price-history@1",              {"token_id": market["token_ids"][0], "interval": "1w", "fidelity_minutes": 360})["output"]["history"]chat = s.post(f"{API}/v1/infer/chat/completions", json={    "model": "b3os/qwen3.5-9b", "temperature": 0, "max_tokens": 80,    "chat_template_kwargs": {"enable_thinking": False},    "messages": [        {"role": "system", "content": "Write one sentence of at most 28 words describing how a prediction market's "                                      "Yes price moved this week. Use only the facts given. No advice, no forecast, no opinion."},        {"role": "user", "content": json.dumps({"question": market["question"], "yes_price_now": history[-1]["p"],                                                "yes_price_a_week_ago": history[0]["p"]})},    ],}).json()brief = chat["choices"][0]["message"]["content"]shot = s.post(f"{API}/v1/render/screenshots", json={    "html": f'<body style="margin:0;background:#0d1117;color:#e6edf3;font:24px system-ui;padding:48px">'            f'<h1>{market["question"]}</h1><p>{brief}</p></body>',    "viewport": {"width": 1120, "height": 480}, "full_page": True,    "style": {"background": "midnight", "frame": "none"}, "format": "webp",}).json()print(shot["artifacts"][0]["url"])

On the remote B3OS MCP server, ask your agent:

text
Search Polymarket for bitcoin markets with the polymarket search action. Take the open Yes/No market with the most24-hour volume whose Yes price is between 5 and 95 cents, and get its Yes price history for the last week every 6hours. Write one sentence on how the price moved, with no advice and no forecast. Then render a 1120 px wide card fromHTML with the question and that sentence on the midnight background, and give me the image URL.

The agent calls actions_call twice, writes the sentence itself and calls render_screenshot with html.