configuring-connected-apps: Salesforce Connected Apps & External Client Apps
Use this skill when the user needs OAuth app configuration in Salesforce: Connected Apps, External Client Apps (ECAs), JWT bearer setup, PKCE decisions, scope design, or migration from older Connected App patterns to newer ECA patterns.
Scope
In scope:
.connectedApp-meta.xmlor.eca-meta.xmlfiles- OAuth flow selection and callback / scope setup
- JWT bearer auth, device flow, client credentials, or auth-code decisions
- Connected App vs External Client App architecture choices
- Consumer key / secret / certificate handling strategy
Out of scope — delegate elsewhere:
- Configuring Named Credentials or runtime callouts → building-sf-integrations
- Deploying metadata to orgs → deploying-metadata
- Writing Apex token-handling code → generating-apex
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First Decision: Connected App or External Client App
| If the need is... | Prefer |
|---|---|
| simple single-org OAuth app | Connected App |
| new development with better secret handling | External Client App |
| multi-org / packaging / stronger operational controls | External Client App |
| straightforward legacy compatibility | Connected App |
Default guidance:
- Choose ECA for new regulated, packageable, or automation-heavy solutions.
- Choose Connected App when simplicity and legacy compatibility matter more.
- Spring '26 note: creation of new Connected Apps is disabled by default in orgs. For new integrations, prefer External Client Apps unless Connected App compatibility is explicitly required.
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Required Inputs
Ask for or infer:
- App type: Connected App or ECA
- OAuth flow: auth code, PKCE, JWT bearer, device, client credentials
- Client type: confidential vs public
- Callback URLs / redirect surfaces
- Required scopes
- Distribution model: local org only vs packageable / multi-org
- Whether certificates or secret rotation are required
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Workflow
1. Choose the app model
Decide whether a Connected App or ECA is the better long-term fit using the decision table above.
2. Choose the OAuth flow
| Use case | Default flow |
|---|---|
| backend web app | Authorization Code |
| SPA / mobile / public client | Authorization Code + PKCE |
| server-to-server / CI/CD | JWT Bearer |
| device / CLI auth | Device Flow |
| service account style app | Client Credentials (typically ECA) |
3. Start from the right template
Read the appropriate template before generating — do not build from scratch:
| Template | Use case |
|---|---|
assets/connected-app-basic.xml | Simple API integration, minimal OAuth |
assets/connected-app-oauth.xml | Web app with full OAuth 2.0 configuration |
assets/connected-app-jwt.xml | JWT bearer / server-to-server |
assets/connected-app-canvas.xml | Embedding external apps in Salesforce UI (Canvas) |
assets/external-client-app.xml | ECA header file — all new ECA builds start here |
assets/eca-global-oauth.xml | ECA global OAuth settings (scopes, PKCE, rotation) |
assets/eca-oauth-settings.xml | ECA per-app OAuth settings |
assets/eca-policies.xml | ECA configurable policies |
If you need source-controlled ECA OAuth security metadata, retrieve it from an org first and treat the retrieved file as the schema source of truth:
sf project retrieve start --metadata ExtlClntAppOauthSecuritySettings:<AppName> --target-org <alias>4. Apply security hardening
Read references/security-checklist.md for the full 120-point security checklist. Favor:
- Least-privilege scopes
- Explicit callback URLs
- PKCE for public clients
- Certificate-based auth where appropriate
- Rotation-ready secret / key handling
- IP restrictions when realistic and maintainable
5. Validate deployment readiness
Read references/testing-validation-guide.md before handoff. Confirm:
- Metadata file naming is correct (see Gotchas below)
- Scopes are justified
- Callback and auth model match the real client type
- Secrets are not embedded in source
6. Handle errors
If deployment fails, check the error output for:
DUPLICATE_VALUE— a Connected App or ECA with this name already exists; rename or retrieve-then-update insteadINVALID_CROSS_REFERENCE_KEY— theexternalClientApplicationname in an ECA settings file doesn't match the.eca-meta.xmlfilename exactlyINSUFFICIENT_ACCESS_OR_READONLY— user lacks the "Manage Connected Apps" permission- If any step fails, do not proceed to the next step — surface the error to the user with the specific message above
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Rules / Constraints
| Rule | Rationale |
|---|---|
| Never commit consumer secrets to source control | Credential exposure risk |
Never use Full scope by default | Unnecessary privilege; request only what the app needs |
| Always use PKCE for public clients (mobile, SPA) | Prevents auth code interception |
| Never use wildcard or overly broad callback URLs | Token interception risk |
| ECA OAuth security settings must be retrieved from org before editing | File schema is not fully documented; retrieve-first ensures accuracy |
Use <alias> placeholders in CLI commands, never hardcoded org URLs | Org URLs vary per environment |
Detect actual packageDirectory from sfdx-project.json before writing files | Projects may not use the default force-app/main/default/ layout |
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Metadata Notes That Matter
Connected App
Default source location (verify via sfdx-project.json → packageDirectories):
<packageDir>/connectedApps/
External Client App
ECA metadata spans multiple top-level source directories. Default locations (verify via sfdx-project.json):
| Directory | Metadata type | File suffix |
|---|---|---|
<packageDir>/externalClientApps/ | ExternalClientApplication | .eca-meta.xml |
<packageDir>/extlClntAppGlobalOauthSets/ | ExtlClntAppGlobalOauthSettings | .ecaGlblOauth-meta.xml |
<packageDir>/extlClntAppOauthSettings/ | ExtlClntAppOauthSettings | .ecaOauth-meta.xml |
<packageDir>/extlClntAppOauthSecuritySettings/ | ExtlClntAppOauthSecuritySettings | .ecaOauthSecurity-meta.xml |
<packageDir>/extlClntAppOauthPolicies/ | ExtlClntAppOauthConfigurablePolicies | .ecaOauthPlcy-meta.xml |
<packageDir>/extlClntAppPolicies/ | ExtlClntAppConfigurablePolicies | .ecaPlcy-meta.xml |
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Gotchas
| Gotcha | Detail |
|---|---|
.ecaGlblOauth not .ecaGlobalOauth | The global OAuth suffix is abbreviated — using the long form will break deployment |
.ecaPlcy not .ecaPolicy | Same abbreviation pattern — the general policy suffix is short form |
.ecaOauthSecurity for security settings | Use .ecaOauthSecurity, not .ecaSecurity |
| ECA OAuth security settings are retrieve-only | Cannot be created from scratch in source — always retrieve from org first |
| Spring '26: new Connected Apps disabled by default | New orgs block Connected App creation; use ECA unless explicitly required |
| Consumer key is generated post-deploy | You cannot set the consumer key in metadata — retrieve it after first deployment |
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Output Expectations
When finishing, confirm and report in this order:
- App type chosen — Connected App or External Client App
- OAuth flow chosen
- Files created or updated — list each metadata file path
- Security decisions — scopes, PKCE, certs, secrets, IP policy
- Next deployment / testing step
Suggested output shape:
App: <name>
Type: Connected App | External Client App
Flow: <oauth flow>
Files: <paths>
Security: <scopes, PKCE, certs, secrets, IP policy>
Next step: <deploy, retrieve consumer key, or test auth flow>
Score: <x>/120---
Cross-Skill Integration
| Need | Delegate to | Reason |
|---|---|---|
| Named Credential / callout runtime config | building-sf-integrations | runtime integration setup |
| Deploy app metadata | deploying-metadata | org validation and deployment |
| Apex token or refresh handling | generating-apex | implementation logic |
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Score Guide
| Score | Meaning |
|---|---|
| 80+ | production-ready OAuth app config |
| 54–79 | workable but needs hardening review |
| < 54 | block deployment until fixed |
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Reference File Index
| File | When to read |
|---|---|
assets/connected-app-basic.xml | Step 3 — template for simple Connected App with minimal OAuth |
assets/connected-app-oauth.xml | Step 3 — template for full OAuth 2.0 Connected App |
assets/connected-app-jwt.xml | Step 3 — template for JWT bearer / server-to-server Connected App |
assets/connected-app-canvas.xml | Step 3 — template for Canvas app embedding in Salesforce UI |
assets/external-client-app.xml | Step 3 — ECA header file template |
assets/eca-global-oauth.xml | Step 3 — ECA global OAuth settings template (PKCE, rotation, callbacks) |
assets/eca-oauth-settings.xml | Step 3 — ECA per-app OAuth settings template |
assets/eca-policies.xml | Step 3 — ECA configurable policies template |
references/oauth-flows-reference.md | Step 2 — detailed OAuth flow comparison and decision guide |
references/security-checklist.md | Step 4 — full 120-point security scoring checklist |
references/testing-validation-guide.md | Step 5 — pre-deployment validation and testing guide |
references/migration-guide.md | When migrating from Connected App to ECA patterns |
references/example-usage.md | Full end-to-end examples for common OAuth scenarios |
