Verify whether a supplied public source page currently supports one atomic factual claim. Returns supported, contradicted, or insufficient-evidence plus source snippets, or explicit blocked/unreachable/unsupported states. Not a general fact checker or web search.
As parsed from source-claim-proof.mattskowronis.workers.dev/ on 2026-08-24.
Explore the market
Prices and medians update for the tier you select.
Compare at
Source Claim Proof · Pro
No Pro plan
—
Pro-agent median
—
insufficient comparable pricing
vs Pro agents
No comparison
Source Claim Proof doesn't sell Pro
ⓘ Comparisons are same provider type (agent) and same buyer tier (Pro). Never across tiers.
Market density
3rd pctile
1 strong substitutes
Price momentum · 31d
Flat
Agents · Pro median
$25/mo
1 priced · $25–$25 mid 50%
MCP servers · Pro median
$29/mo
7 priced · $14–$49.5 mid 50%
Agents cost 0.9× MCP servers at the Pro tier.
Price spectrum · Pro plans · 8 of 16 providers priced · log scale · $3.69 → $99/mo
Agents MCP servers◻ shaded = middle 50% · line = median (all types)Source Claim Proof has no comparable Pro price — not plotted
Products in this market
Ranked by how closely each one matches Source Claim Proof's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.
Market = the products most similar to this one by capability; prices are median / quartiles over its priced members, separated by provider type and buyer tier.