world-id-mcp

name	world-id-mcp
description	Build, configure, and submit World ID 4.0 apps and Mini Apps via the World developer portal. Use whenever the user wants to ship something to the World app store, set up sign-in-with-World-ID, or manage signing keys / actions for an existing app.

World ID developer portal MCP

This MCP authenticates with a developer-portal team API key and exposes 11 tools for the full app lifecycle. Always use get_team_context first if the user hasn't given you an app_id — it returns the team and any existing apps so you can pick or confirm.

Tool reference

Tool	Purpose	Key inputs
get_team_context	List the team's apps + status	(none)
get_app_config	Snapshot of an app: World ID config, store metadata, mini-app settings	app_id
create_app	Create a new production app	name; optional app_mode (external | mini-app), verification (cloud | on-chain), category, integration_url
configure_world_id	Create a managed World ID 4.0 RP for the app: KMS manager key, on-chain registration, signer wallet	app_id; optional signer_private_key (else the server generates one and returns it once)
get_world_id_signing_key	Read the signer address for an app. Private key is never returned here.	app_id; optional rotate_if_unavailable
rotate_world_id_signing_key	Generate a new World ID signing key. Returns the private key once.	app_id; optional signer_private_key
get_world_id_registration_status	Sync the on-chain registry status for an RP	app_id
create_world_id_action	Create / update a v4 action (the thing you verify against)	app_id, action; optional description, environment
configure_mini_app	Update mini-app store metadata + Advanced/Permissions config	app_id; many optional fields, see below
upload_app_image	Upload an app image (logo, hero, content_card, meta_tag, showcase_1/2/3) and patch the matching *_url field	app_id, image_type, one of source_url (https only, public addr, no redirects) / image_base64. Format detected from magic bytes. PNG/JPEG ≤500KB.
submit_app_for_review	Submit an unverified app for review. Requires confirm_submission: true.	app_id, confirm_submission; optional changelog, is_developer_allow_listing

Canonical flows

A. Build an external (non-mini) World ID app end-to-end

1. create_app             { name, app_mode: "external", verification: "cloud" }
2. configure_world_id     { app_id, generate_signing_key: true }      ← capture private_key, it's one-time
3. create_world_id_action { app_id, action: "verify-account" }
4. upload_app_image       { app_id, image_type: "logo",       source_url }   ← required: logo_img_url
5. upload_app_image       { app_id, image_type: "showcase_1", source_url }   ← required: ≥1 showcase per locale
6. configure_mini_app     {
                            app_id,
                            app_website_url:     "https://your-app.example",
                            description_overview: "What the app does, in one paragraph.",
                            supported_countries: ["us"],
                            supported_languages: ["en"],
                            is_android_only:     false,
                            is_for_humans_only:  false,
                          }
7. submit_app_for_review  { app_id, confirm_submission: true }

After step 2, store the returned private_key in the developer's app environment as WORLD_ID_PRIVATE_KEY (or whatever their app expects). The portal does not retain it.

B. Build a Mini App with full Advanced settings

1. create_app             { name, app_mode: "mini-app" }
2. configure_world_id     { app_id, generate_signing_key: true }      ← only if the mini app verifies proofs itself
3. upload_app_image       { app_id, image_type: "logo",         source_url }   ← required
4. upload_app_image       { app_id, image_type: "content_card", source_url }   ← required for Mini Apps
5. upload_app_image       { app_id, image_type: "showcase_1",   source_url }   ← required: ≥1 showcase per locale
6. configure_mini_app     {
                            app_id,
                            short_name:           "MyApp",
                            category:             "Other",
                            world_app_description: "One-line tag line",
                            description_overview:  "What the mini app does, in one paragraph.",
                            app_website_url:      "https://your-app.example",
                            support_link:         "mailto:[e-mail]",  // or "https://your-app.example/support"
                            supported_countries:  ["us"],
                            supported_languages:  ["en"],
                            is_android_only:      false,
                            is_for_humans_only:   false,
                            // optional Advanced fields:
                            contracts:            ["0x..."],
                            permit2_tokens:       ["0x..."],
                            max_notifications_per_day: "2",
                          }
7. submit_app_for_review  { app_id, confirm_submission: true }

configure_mini_app accepts store metadata, Advanced/Permissions config, and the App Store description in a single call:

If an app already has an approved version and no current draft, configure_mini_app and upload_app_image first create an unverified draft copied from the approved metadata, then apply the change. Successful responses include draft_created: true when that happens.

• description_overview: string — required for review; the human-readable overview shown to users in the app store. Pass it as a plain string here; the server JSON-encodes it (with description_how_it_works and description_connect) into the underlying app_metadata.description column for you. Don't pre-construct the JSON yourself.
• description_how_it_works, description_connect — optional companion sections (also stored inside the encoded description JSON).
• contracts: string[] — Worldchain contract addresses the mini app calls
• permit2_tokens: string[] — token addresses approved for Permit2 signing
• whitelisted_addresses: string[] — wallets allowed to interact (pass [] to disable)
• associated_domains: string[] — universal-link domains
• can_import_all_contacts, can_use_attestation — capability toggles
• max_notifications_per_day: "0" | "1" | "2" | "unlimited" — notification cap (string-only enum so MCP clients with strict JSON schema validators accept all values; "unlimited" automatically sets is_allowed_unlimited_notifications: true)

All address arrays are validated as 0x + 40 hex chars; URLs as https://...; reject any element with an embedded comma.

C. Upload images (logo / hero / content_card / meta_tag / showcase_N)

upload_app_image accepts the bytes in two ways:

• source_url — public HTTPS URL the server fetches (best for URLs the user already gave you, or staging asset CDNs)
• image_base64 — base64-encoded bytes (use for local files)

When the user gives you a local file path, base64-encode it client-side via Bash and pass through:

# in Bash:
base64 -i ./logo.png
# pipe / capture the output, then call upload_app_image:
upload_app_image { app_id, image_type: "logo", image_base64: "<that string>" }

You don't need to specify the format — the server inspects the magic bytes and stores the file as PNG or JPEG accordingly. Anything that isn't a real PNG/JPEG (or anything >500KB) is rejected with -32602.

source_url is fetched server-side over HTTPS only, must resolve to a public address (loopback / private / link-local rejected), and redirects are not followed — if the user gives you a URL that redirects, resolve the final URL client-side first.

The server uploads the bytes to S3 and patches app_metadata.{logo_img_url|hero_image_url|content_card_image_url|meta_tag_image_url|showcase_img_urls[N]} in one call. No follow-up configure_mini_app is needed for images. Successful responses include committed: true.

If the metadata patch fails after the S3 upload (rare — typically a transient Hasura error), the server best-effort deletes the S3 object and returns -32603 with data: { committed: false }. Retries are idempotent, so just call the same tool again.

upload_app_image is rate-limited per API key: 60 uploads/minute, 500/day. Hitting the cap returns -32029 with data.retry_after_seconds.

Image bytes flow through your context as base64 — fine for typical app icons (<100KB), wasteful for very large screenshots. Prefer source_url whenever the image is already on the web.

D. Rotate a leaked signing key

1. rotate_world_id_signing_key { app_id }

Returns a fresh private_key once. Submits the on-chain updateRp transaction (primary registry, plus best-effort staging on production deployments) and updates app_metadata.signer_address. The status flips to pending until the on-chain TX confirms; poll status_endpoint to watch the transition back to registered. Self-managed RPs (e.g. legacy registrations not created via MCP) return -32004 with data.reason: "self_managed_mode" — those have to be rotated by the developer themselves.

E. Read-only inspection

get_team_context                    ← what apps exist, their status
get_app_config         { app_id }   ← world ID config, store metadata, actions
get_world_id_signing_key { app_id } ← signer address (no private key)
get_world_id_registration_status { app_id }  ← on-chain registry sync

Pitfalls and constraints

• configure_world_id is asynchronous. The on-chain registration is submitted to the bundler and returns immediately with status: "pending" and an operation_hash. Watch status_endpoint until it returns production_status: "registered" before relying on the RP for verifications.
• configure_world_id is available by default. There is no team-level World ID 4.0 feature flag gate. Staging apps return -32004 with data.reason: "staging_not_supported" — use a production app instead. If the app already has an RP registration, the tool returns the existing record (use rotate_world_id_signing_key to change keys).
• Private keys are returned once. If the user loses the value from configure_world_id / rotate_world_id_signing_key, they must rotate again. The portal does not store private keys.
• Submission preconditions are strict. submit_app_for_review runs the same Yup completeness check as the dashboard. The full required set:
  • Always required: name, logo_img_url, app_website_url, is_android_only, is_for_humans_only, supported_countries (≥1), supported_languages (must include "en"), description_overview (encoded into the description JSON), and at least one entry in showcase_img_urls for the English locale.
  • Mini-app additional: short_name, category, world_app_description (the tag line), content_card_image_url, and either support_link (HTTPS URL) or support_link set to a mailto: URL.
  • On failure the server returns a -32602 with the exact field path; surface that to the user verbatim.
• Use upload_app_image, not configure_mini_app, for image fields. Image fields store filenames (logo_img.png), not full URLs — the dashboard reconstructs the CDN URL at view time. upload_app_image handles the S3 upload and stores the right filename automatically. Passing , , , , or to is rejected with .

When in doubt

• get_team_context first to see what's already there. Reusing an existing app is almost always cheaper than creating a duplicate.
• Echo the app_id and signer_address you're operating on to the user before destructive actions (rotate, submit).
• Treat any -32602 (invalid params) error as user-fixable input; surface the validation errors verbatim. Treat -32603 (internal) as something to retry once and then escalate.