API testing built for the bank's perimeter, not around it
Retail banking, capital markets, and payment networks share three constraints: API specs can't leave the bank, SOAP/WSDL is still part of the integration stack, and every release needs audit evidence. Shift-Left API was designed for that posture.
What blocks banks from adopting modern API testing
The decision rarely turns on features. It turns on whether the tool clears AI policy review, security questionnaire, and procurement on the first pass.
Cloud-LLM API testing fails the AI policy review
Most AI-native testing tools call OpenAI, Anthropic, or Google with your OpenAPI spec attached. For a bank, that spec describes payment endpoints, account-lookup queries, and KYC integration shapes — material non-public information. Shift-Left API can run against a self-hosted LLM (Ollama, vLLM, LM Studio; Trial and Enterprise) inside your perimeter, which is what your existing AI policy was already written to allow.
SOAP and WSDL still run the rails
ISO 20022 messaging, SWIFT integration adapters, core-banking middleware, and most payment-network APIs are SOAP services with WSDL contracts. Replacement testing tools that "support SOAP" but actually treat it as a legacy mode produce unreliable contract validation. Shift-Left API treats REST, SOAP/WSDL, and GraphQL as equal first-class protocols.
Audit evidence on every release
PCI-DSS 11.3, SOX ITGC, FFIEC change-management, and increasingly DORA Article 25 ask for documented evidence of test coverage on the controls that matter. Audit log capture, exportable test-run reports, and per-project role assignments are baseline — not a roadmap line item.
Test data cannot leave the bank
Account numbers, card PANs, customer names, and transaction details are protected under GLBA and equivalents. Self-hosted, synthetic test data and the test runner stay on-prem in the same boundary — never in a SaaS workspace.
Control evidence mapping
How API test artifacts and run evidence map to the frameworks bank auditors actually ask about.
| Framework | How API test evidence applies |
|---|---|
| PCI-DSS 11.3 / 11.4 | Documented test cases on cardholder-data path APIs; exportable evidence per release. |
| SOX ITGC change-management | Per-release run reports, role-scoped sign-off, audit log of who ran which test against which environment. |
| FFIEC IT Handbook (Development & Acquisition) | Test changes recorded with before and after values; credentials stored per environment with AES-256 encryption at rest. |
| GLBA Safeguards Rule | Credentials redacted from captured headers; with a self-hosted LLM (Trial and Enterprise), no test data goes to third-party AI services. |
| DORA (EU) Article 25 — ICT testing | Repeatable, evidenced API testing across CI/CD with role-scoped audit trail. |
| SOC 2 CC7.1 / CC8.1 | Change-detection on API contracts; test execution evidence retained and exportable. |
| OWASP API Security Top 10 / PCI DSS 4.0 | With the API security testing add-on: OWASP-mapped checks generated beside your functional tests, including object-level authorization with a second test user, injection, SSRF and configuration checks; CVSS v3.1 findings and a PCI DSS 4.0 compliance view. Evidence of testing; it does not replace the Requirement 11.4 penetration test. |
This is positioning evidence, not a compliance attestation. Talk to your auditor for binding control coverage decisions. For the control-by-control detail, see API Testing SOC 2 Controls. Security-testing evidence comes from the API security testing add-on, a paid add-on to Professional, Custom and Enterprise licences that is included in the trial.
Integration surface we're built to test
Core banking middleware (Temenos, Finacle, FIS, Jack Henry)
SOAP/WSDL contract testing with per-environment endpoint configuration.
Card networks & payment processors
REST and SOAP fixtures. Credentials are redacted from captured request headers; use synthetic or masked test data, because request and response bodies are stored as sent (protected by your database encryption).
ISO 20022 / SWIFT messaging adapters
XML response assertions (SOAP fault, envelope and XPath-style element checks); contract-drift detection between releases.
Open Banking / PSD2 endpoints
OAuth 2.0 (five grant types incl. PKCE and device code), mTLS and JWT Bearer auth profiles, with negative-path tests.
Internal customer-360 and KYC services
Synthetic data fixtures; never sends customer attributes to a cloud LLM.
Insurance carrier scenarios — claim adjudication, NAIC/state DOI integrations, HL7/FHIR for health insurers — covered on the insurance industry page.
API testing proof for banking
What the platform does for the API types banks actually run. Each statement is checked against the shipping product; plan and add-on limits are stated where they apply.
| API type | What Shift-Left API does |
|---|---|
| Payments APIs (REST) | Generates positive, negative and boundary tests from your OpenAPI description, covering required fields, formats, enums, minimum and maximum values and declared error codes, without needing an AI key. Data-driven tests can read test data read-only from PostgreSQL, MySQL, SQL Server, Oracle, SQLite or MongoDB. |
| Payment business flows | With the API security testing add-on: checks for idempotency-key reuse, a race on a one-time operation (six simultaneous attempts), skipped or reordered steps, and values tampered between steps.Paid add-on, included in the trial. Data-changing checks run only on a non-production environment an administrator allows, never on production. |
| Open banking and PSD2 endpoints | Auth profiles for OAuth 2.0 (five grant types, including authorization code with PKCE and device code), mutual TLS and JWT Bearer, on every plan. The server holds and renews refresh tokens. |
| Core banking and ISO 20022 adapters (SOAP/WSDL) | WSDL import by URL or file, with SOAP 1.1 and 1.2 detected per binding, and XML assertions on faults, envelopes and elements.WS-Security is not supported (nor MTOM or WS-Addressing); SOAP services authenticate with HTTP-level auth. |
| Card and account data | With the security add-on: checks for secrets and card numbers in API responses and for object-level authorization with a second test user; evidence is stored with card numbers cut to the last four digits.Credentials in captured request headers are redacted on every plan. Request and response bodies are stored as sent, so use synthetic or masked data. |
Banking API Test-Case Pack
34 banking API test cases: payment idempotency, PSD2 open banking consent, SCA dynamic linking, card masking and ISO 20022, with the deployment checklist.
Capability statements, not customer results: we do not publish customer names or outcomes we cannot share. The test-case pack lets your team check the approach against your own APIs.
Capabilities banks lean on
The platform features that map to a bank's constraints — audit evidence, self-hosted execution, SOAP/WSDL, and identity governance.
Shift-Left Agent
Run API tests from your own machine, against APIs only your network can reach.
Learn moreSOAP
Test SOAP web services with WSDL import and XML response assertions.
Learn moreRBAC
Control who can view and edit tests, per project.
Learn moreTraceability (RTM)
Prove coverage from every requirement to the tests that verify it.
Learn moreSSO
Configure SAML 2.0 or OpenID Connect, with an Entra ID preset and group-to-role mapping.
Learn moreSecret Managers
Pull credentials from HashiCorp Vault at run time, so they never live in your tests.
Learn moreBring your security architect to the call
30-minute working call. Self-hosted deployment topology, AI-policy alignment notes, and security questionnaire response shared on the call so your security team can review in parallel.