Signalis — Global Intelligence, Real-Time Awareness for AI Agents

API at https://api.signalis.dev (website https://signalis.dev). Signalis has two surfaces. Master Intelligence cross-analyzes 14 signal sources (prediction markets, macro/FRED data, crypto, GitHub trends, social/Moltbook chatter, and more) with an LLM every 4 hours into a single structured digest — an executive summary, full markdown analysis, cross-domain insights, the active narratives it detects, discrete signals, and an overall sentiment read. Pulse is the AI-business narrative layer: it clusters scraped content (Reddit, HN, news, and more) into named narratives with a lifecycle stage (emerging / building / peak / fading) and momentum, exposes each narrative's driving content items and source attribution, keeps historical narrative digests, and serves the raw recent content items behind it all. Strictly pay-per-call via x402 — no accounts, no API keys, no bundles. Compute-first / settle-after: you are never charged for an error.

Signalis is the cross-source intelligence product spun out of moltalyzer. api.signalis.dev is the new canonical home for what moltalyzer served at /api/intelligence/* and /api/pulse/ai-business/*. moltalyzer still serves those legacy paths today; they migrate to 308-redirects soon — point new integrations at api.signalis.dev.

Free endpoints (no auth, no payment)

Poll the master-digest feeds for free to detect a new digest and learn every response shape before paying. /v1/intelligence/sample returns a recent (8+ hours old) digest, explicitly labelled as a sample — the same shape as a live digest, but aged, so it is safe for shape-testing without implying it is the freshest data. All free endpoints are rate-limited 5/min per IP.

curl https://api.signalis.dev/v1/intelligence/latest

Paid endpoints (x402 V2, USDC on Base only, per-call)

Each paid call is a flat price per call, settled per call via x402. Networks: Base Mainnet only (eip155:8453). Compute-first / settle-after — you are never charged for an error, and the Pulse routes proxy the standalone Pulse service so you are never charged when Pulse is unavailable or returns an error.

Params for /v1/intelligence/history: hours (integer 1-168, default 48), limit (integer 1-50, default 10). Params for /v1/pulse/narratives/{id}: id (narrative id, path parameter). Params for /v1/pulse/digests: since (integer digest index — fetch items after it, poll pattern). All prices are USD, settled as USDC (6 decimals) on Base.

Paying (x402)

Paid routes settle per call via x402 V2. The only accepted rail is USDC on Base Mainnet (eip155:8453) — no other network. No account, no signup, no API key.

Pay flow:

1. Call the paid route with no payment → receive HTTP 402. The x402 V2 PaymentRequirements ride in the base64 PAYMENT-REQUIRED header; the JSON body mirrors the price + accepts.
2. Sign an EIP-3009 exact USDC authorization on Base for the accepts[] amount.
3. Retry the same request with the payment in the PAYMENT-SIGNATURE (V2) or X-PAYMENT (legacy) header.

# 1. Probe for the 402 challenge (price + accepts):
curl -i "https://api.signalis.dev/v1/pulse/narratives"
# → HTTP/1.1 402 Payment Required, PAYMENT-REQUIRED header (base64 requirements)

# 2. Sign + retry with a stock x402 client (handles the whole flow):

import { wrapFetchWithPayment } from "@x402/fetch";
import { createWalletClient, http } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { base } from "viem/chains";

const account = privateKeyToAccount(process.env.PRIVATE_KEY as `0x${string}`);
const wallet = createWalletClient({ account, chain: base, transport: http() });
const fetchWithPay = wrapFetchWithPayment(fetch, wallet); // signs EIP-3009 on 402, retries

// $0.01 — active AI-business narratives:
const narratives = await fetchWithPay(
  "https://api.signalis.dev/v1/pulse/narratives",
).then((r) => r.json());
// narratives.narratives[] (id, title, summary, stage, momentum), narratives.charged

// $0.03 — historical master digests, last 48h:
const history = await fetchWithPay(
  "https://api.signalis.dev/v1/intelligence/history?hours=48&limit=10",
).then((r) => r.json());

Stock x402 clients (@x402/fetch, @x402/axios, python x402) do the 402 → sign → retry automatically. Discover the machine-readable route + price catalog at /.well-known/x402.

Free funnel

Try the master-digest response shape for free before you pay. Poll /v1/intelligence/index (5/min) to detect a new digest on its ~4h cadence; read /v1/intelligence/brief (5/min) for the trimmed current digest or /v1/intelligence/latest (5/min) for the full latest digest; hit /v1/intelligence/sample (5/min) for a recent aged digest to learn the exact response contract before spending. Every digest carries createdAt provenance and the 4-hour cadence is advertised on /v1/intelligence/index, so you always know how fresh the data is. The paid Pulse routes proxy the standalone Pulse service and are compute-first / settle-after — you are charged only when Pulse returns data.

Machine discovery

Terms: https://api.signalis.dev/terms.txt

Disclaimer: Cross-source intelligence aggregated from public data and LLM-synthesized; informational only, provided as-is without warranty. Digest and narrative analysis is model-generated and may be imperfect — every response carries createdAt provenance so you can judge freshness.