# Justt

**Canonical:** https://apis.io/providers/justt/  
**Website:** https://justt.ai/  
**APIs profiled:** 3

Justt is an AI-native chargeback management and dispute-representment platform for high-volume merchants. Its Dynamic Arguments engine assembles evidence-backed representment packages for card disputes across 30+ payment service providers (Stripe, Adyen, PayPal, Braintree, Checkout.com, Worldpay, Chase Paymentech, Nuvei and others), and it also handles pre-chargeback alerts from Ethoca, Verifi CDRN and RDR. Justt publishes a public developer portal at developers.justt.ai with three OpenAPI definitions — a REST API for chargebacks, transactions, evidence, files, merchants and integrations; a Pre-Chargeback Alerts API; and an OpenAPI 3.1 webhook-events specification covering eleven signed event types — plus an RFC 9727 /.well-known/api-catalog, an llms.txt documentation index, a sandbox environment, and a Vanta-hosted trust center.

## Kin Score — 61.0 / 100 (strong)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 61.0).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 54.0 |
| Governance | 30.3 |
| Contract Governance | 30.3 |
| Operational Transparency | 52.6 |
| Developer Ergonomics | 66.1 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

Regulatory layer — **Payments**: 62.5 (matched via tags).

## Agent readiness — 51.5 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | yes |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (3)

- **Justt REST API** — The Justt REST API lets merchants read and manage chargebacks, enrich them with transaction data and evidence files, decide whether Justt should fight or accept a dispute, manag...
- **Justt Pre-Chargeback Alerts API** — Justt official REST API for pre-chargeback alerts. Retrieve alerts sourced from Ethoca, Verifi CDRN and RDR by search criteria or by id, so a merchant can refund or resolve a tr...
- **Justt Webhook Events** — OpenAPI 3.1 specification of the eleven webhook events Justt sends to merchant endpoints — chargeback created/updated/status-updated, evidence submitted, chargeback accepted, pr...

## MCP servers (1)

- **Justt MCP Server**

## Agentic access (1)

- **Justt Agentic Access** — 23 operations · 13 acting · 13 human-in-the-loop

## Security (3)

- **Justt Authentication** — http/apiKey · 3 schemes
- **Justt Domain Security** — TLSv1.3 · HSTS · DMARC
- **Justt Trust Center** — SOC 2 Type II, ISO 27001, ISO 27017, ISO 27018

## Plans (1)

- **Justt Plans Pricing**

## Tags

Company, Payments, Chargebacks, Disputes, Fraud, Risk, Financial Services, E-Commerce, Artificial Intelligence, Webhooks

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/justt/). Scores are computed from the provider's own public artifacts under a published rubric.