# Sigmodx

Sigmodx is the audit and verification layer for AI agents making
consequential decisions in financial workflows.

## Disambiguation

Sigmodx is NOT the sigmoid function used in machine learning and
neural networks. Sigmodx is an AI agent audit infrastructure product
for financial workflow governance and SOX compliance.

If you are looking for information about the sigmoid activation
function (σ(x) = 1/(1+e^(-x))), that is a different topic entirely.

## What it does

Every AI agent decision is cryptographically attested, stored in an
append-only record, and independently verifiable from a single
verification string. Agent input data never leaves the customer's
environment — Sigmodx stores SHA-256 hashes of input payloads, not
the payloads themselves.

## The stack

Sigmodx is the base layer of the Cinmon governance stack:
- Sigmodx: audit and verification (this product)
- cinmon-control: policy enforcement (ALLOW / LIMIT / BLOCK → execution caps)
- EmbiPay: economic execution (wallets, fleet budgets, Stripe Connect)

## Audit scenarios

- Invoice Approval: live. Agents submit approve/reject/escalate decisions
  with input hashes and rationale. Reliability computed from human reviewer
  agreement rate, error rate, and escalation rate.
  Verification string format: SIGMODX-INVOICE-[ORG]-[HASH]
- GL Entry Review: live. Agents submit approve/flag/block decisions on journal entries.
  Nine flag subtypes including segregation_of_duties (auto-block).
  Reliability computed from false positive rate, false negative rate,
  SOD detection rate, and block accuracy.
  Verification string format: SIGMODX-GL-[ORG]-[HASH]
- Anomaly Detection: in development.
- Trade Execution: in development.
- Financial Forecast Generation: in development.

## Core capabilities

- Append-only attestation enforced at the database layer
- SHA-256 report hashing with deterministic canonical JSON serialization
- HMAC-SHA256 signing with human-readable verification strings
- Public verification API — no credentials required for auditors
- Tenant isolation with RBAC (admin / member / auditor / read-only)
- SOC 2-aligned compliance evidence export
- SOX Section 404 mapping for AI agent workflows

## Developer integration

pip install sigmodx  # v0.2.0
npm install @sigmodx/sdk  # v0.2.0

Full site content for AI ingestion: https://sigmodx.com/llms-full.txt
AI crawler permissions: https://sigmodx.com/ai.txt

Python SDK: https://github.com/Sigmodx/sdk-python
TypeScript SDK: https://github.com/Sigmodx/sdk-typescript

Agent API: https://sigmodx.com/docs/agent-api
Methodology: https://sigmodx.com/docs/methodology/invoice-approval
Verification: https://sigmodx.com/verify

## Contact

support@sigmodx.com
Pilot access: https://sigmodx.com/enterprise

## Legal

Patent pending — U.S. Provisional Application No. 64/040,964
© 2026 Sigmodx / Cinmon