# Services from api.signalnodus.ai on Zero

> api.signalnodus.ai serves 16 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/api.signalnodus.ai
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.signalnodus.ai/health.json

## Services

- [Signal Nodus SEC Filing Section Retrieval](https://www.zero.xyz/c/signal-nodus-sec-filing-section-retrieval-12218e5e/llms.txt): $0.05/call via x402. Retrieves a specific section of an SEC filing by accession number, returning the raw section text as the on-ramp for year-over-year diff analysis
- [Signal Nodus Latest SEC Filings](https://www.zero.xyz/c/signal-nodus-latest-sec-filings-1b4b9ea3/llms.txt): $0.01/call via x402. Returns the most recent SEC filings with year-over-year diffs of filing sections, pinned to accession numbers, enabling change detection in regulatory documents.
- [Signal Nodus – Institutional Holders Lookup](https://www.zero.xyz/c/signal-nodus-institutional-holders-lookup-1ec4887f/llms.txt): $0.05/call via x402. Returns the list of institutional reporting managers (13F filers) who hold a given company's stock, sourced from SEC filings and pinned to accession numbers.
- [Signal Nodus Holdings](https://www.zero.xyz/c/signal-nodus-holdings-ba6a6ca1/llms.txt): $0.05/call via x402. Retrieves institutional investment holdings from SEC 13F filings for a specified fund manager, including position sizes and portfolio weights.
- [Signal Nodus SEC Filings List](https://www.zero.xyz/c/signal-nodus-sec-filings-list-43cd9a57/llms.txt): $0.01/call via x402. Returns a list of SEC filings (e.g. 10-K, 10-Q) for a company, with accession numbers and filing dates, as an on-ramp to year-over-year section diffs.
- [Signal Nodus Insider Transactions](https://www.zero.xyz/c/signal-nodus-insider-transactions-0fba09f9/llms.txt): $0.05/call via x402. Retrieves SEC insider trading transaction data (Form 4 filings) for a given company, including insider names, roles, transaction codes, share counts, and prices.
- [Signal Nodus SEC Filing Diff](https://www.zero.xyz/c/signal-nodus-sec-filing-diff-dba9f6ec/llms.txt): $0.5/call via x402. Returns year-over-year text diffs of specific SEC filing sections, comparing added and removed content between filings pinned to accession numbers.
- [Signal Nodus Financials](https://www.zero.xyz/c/signal-nodus-financials-8ecf7bf2/llms.txt): $0.01/call via x402. Returns year-over-year diffs of SEC filing financial facts for a given concept, pinned to accession numbers
- [Signal Nodus Credit Registration](https://www.zero.xyz/c/signal-nodus-credit-registration-04b3c49f/llms.txt): $9/call via x402. Registers a new Signal Nodus account by settling an x402 payment, returning an API key and credit balance for accessing SEC filing year-over-year diff data.
- [Signal Nodus EVM Gas Price](https://www.zero.xyz/c/signal-nodus-evm-gas-price-c9c8d6a1/llms.txt): $0.01/call via x402. Returns the current gas price in Gwei for an EVM-compatible blockchain at a specified block
- [Signal Nodus EVM Balance Lookup](https://www.zero.xyz/c/signal-nodus-evm-balance-lookup-5654119d/llms.txt): $0.01/call via x402. Returns the native token balance of an EVM wallet address at a specific block on a given chain
- [Signal Nodus Markets Prediction](https://www.zero.xyz/c/signal-nodus-markets-prediction-2ca033b1/llms.txt): $0.01/call via x402. Returns current prediction market questions, trading volumes, and outcome probabilities for financial and macro events
- [Signal Nodus FX Rate](https://www.zero.xyz/c/signal-nodus-fx-rate-9aed511a/llms.txt): $0.01/call via x402. Returns current foreign exchange rates for multiple currencies relative to a base currency (e.g. USD)
- [Signal Nodus Domain Report](https://www.zero.xyz/c/signal-nodus-domain-report-ef6d9c99/llms.txt): $0.01/call via x402. Returns domain intelligence metadata (SPF, age, registrar, nameservers, resolution status) for a given domain name
- [Signal Nodus Token Price](https://www.zero.xyz/c/signal-nodus-token-price-12cbb2ba/llms.txt): $0.01/call via x402. Returns the current USD price and 24-hour trading volume for a given token symbol (e.g. USDC).
- [Signal Nodus EVM Receipt Lookup](https://www.zero.xyz/c/signal-nodus-evm-receipt-lookup-b0c598f9/llms.txt): $0.01/call via x402. Retrieves EVM transaction receipt data including gas used and log count for a given transaction on the blockchain

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)