Signal Nodus vs the alternatives
Priced on a real workload: 20 year-over-year section diffs a year, with company lookups and section pulls around them. Not on tool counts.
Cost for 20 diffs a year
| Signal Nodus | sec-api.io | Self-hosted EDGAR parser | |
|---|---|---|---|
| 20 diffs + 100 section pulls / year | $15 (20 × $0.50 + 100 × $0.05) | $2,868/yr ($239/mo Business tier; section extraction is not in the $55 entry tier — their pricing page, checked 2026-08-15) | $0 cash + your engineering time |
| Idle months | $0 | $239/mo regardless | $0 |
| Amendment safety | Accession pinning on every call; unpinned responses warn when a later amendment exists | Their own tooling; check their docs | Yours to build and test |
| Measured accuracy | Published golden-set eval, failures listed, reproducible harness | Not published, to our knowledge | Yours to build; our eval harness is open and works on any parser |
| Setup | One MCP URL or one curl | Account + subscription | Parser + cache + rate limiting + monitoring |
When not to use us
EDGAR is free and several open-source EDGAR MCP servers exist. If you run thousands of diffs a month, self-hosting is cheaper than anyone's API and you should do it; take our parser and eval set with you, they are MIT. What you are paying for here, per call and with no floor, is the measured error rate, the amendment handling, and not running the infrastructure.
Try the diff
curl "https://api.signalnodus.ai/v1/compare?company=NVDA&item=1A" \
-H "authorization: Bearer <key>" # free $5 key at /trial