Access TaxSentry's IRS-grounded AI via API. Every answer cites a verified IRS source. Built for tax software, payroll platforms, and AI assistants that need accurate, auditable tax answers.
3,000+
IRS document chunks
70+
IRS publications & form instructions
74
IRC code sections
EN / ES
Bilingual responses
One endpoint. One answer. Every response includes the IRS source it came from — so your users can verify, and your product stays defensible.
/v1/askTax Q&A — grounded answer with IRS source citations
/v1/analyzeDocument analysis — upload PDF/image, get findings + risks
/v1/draft-letterIRS letter drafting — penalty abatement, CP notices, installment
/v1/strategyTax strategy analysis — multi-query parallel RAG scan
const res = await fetch(
'https://taxsentry.us/api/v1/ask',
{
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
question: "§179 expensing limit 2025?",
language: "en", // or "es"
}),
}
)
const data = await res.json()
// {
// answer: "The §179 limit for 2025...",
// grounded: true,
// sources: [
// {
// title: "Publication 946",
// url: "https://irs.gov/pub/...",
// source_type: "publication"
// }
// ]
// }Everything you need to integrate TaxSentry.
All requests require a Bearer token in the Authorization header.
Your API key starts with ts_live_ and is issued after checkout.
Authorization: Bearer ts_live_xxxxxxxxxxxx
Keys are hashed server-side — we never store your raw key.
Companies that deal with tax questions at scale.
Embed verified IRS answers directly in your workflow. Your users get cited, grounded answers without leaving your app.
Augment your team with instant access to 3,000+ IRS document chunks — publications, IRC sections, IRBs, form instructions.
Add tax intelligence to your existing assistant. Every answer cites its IRS source — your users always know where the answer came from.
Auto-answer withholding, fringe benefit, and payroll tax questions with real-time IRS accuracy. Reduce support tickets significantly.
Pay for what you use. No seat licenses. No minimums after your first month.
Starter
$0.049/call · $0.08/call overage
Builder
$0.036/call · $0.06/call overage
Scale
$0.024/call · $0.04/call overage
Enterprise
100,000+ calls/month · Custom SLA · On-premise option · Dedicated knowledge base · Volume pricing from $0.015/call
All plans include a 50-call sandbox to test before going live. No credit card required for sandbox access.
70+ publications, 74 IRC sections, 3,000+ IRBs — parsed, chunked, embedded, and kept current automatically. Building this yourself takes months and ongoing maintenance.
Every answer returns the IRS document it came from. Your users can verify. Your product doesn't get blamed for hallucinations. Huge for CPAs and EAs who need to defend recommendations.
New IRBs are ingested within 48 hours of IRS publication. Publications refresh annually. You get current law without maintaining a scraper or ingestion pipeline.
Send us an email and we'll get you set up with sandbox credentials within 24 hours.
sales@espartan.netOr reach us at sales@espartan.net