Ground agents in verifiable US sales tax rates by ZIP and state so pricing and checkout answers rest on real jurisdiction data.
An agent asked about prices or rates will happily invent a figure. Enable Sales Tax and it calls the salestax tool to check the live number before it answers — so the reply rests on real data, not the model's memory.
Give a market assistant a source it can actually cite: every figure it reports carries Sales Tax as its origin, so a human can trace where the number came from.
Because the model pulls sales tax at the moment it responds, the answer reflects the market now — not whatever was true when the model was trained.
Point your agent framework at the VerveContext endpoint. Every enabled source — this one included — becomes a tool the model can call. No per-source plumbing.
{
"mcpServers": {
"vervecontext": {
"url": "https://api.vervecontext.com/v1/mcp",
"headers": { "x-api-key": "vc_live_••••" }
}
}
}Each call returns structured fields your agent can read — and trace back to this source.
statezipregionratecountycityspecialHow to ground an agent in it over MCP.
