> ## Documentation Index > Fetch the complete documentation index at: https://docs.lumeus.dev/llms.txt > Use this file to discover all available pages before exploring further. # Check Assets readiness > Returns `{"ready":true}` while the state index is within 60 ledgers of the network tip, else 503 with `{"ready":false}` and Retry-After 5 (also while it is still bootstrapping). Data routes answer 503 with Retry-After in that state. No authentication. ## OpenAPI ````yaml /api-reference/assets.json get /readyz openapi: 3.0.3 info: title: Lumeus Assets API version: '2026-09-15' description: >- Lumeus Assets API on Stellar. Sign up at https://app.lumeus.dev: Free, Starter, Growth and Scale plans are self-serve, Enterprise by agreement. - **Pricing.** Testnet is free: Testnet requests cost no credits and are never billed. Each organization can make 10,000 Testnet requests a day across Activity, Assets and RPC (unlimited on Enterprise); the count resets at 00:00 UTC, and a request over it answers 429 rate_limited with Retry-After set to the seconds until then. Mainnet requests draw from the plan's monthly credits. Plans, limits and credit weights: `GET https://api.lumeus.dev/v1/plans`. - **Authentication.** Send `Authorization: Bearer `, the same keys as Activity and RPC. Testnet: `lum_test_…`; Mainnet: `lum_live_…`. A key works only on its own network, so pick the server that matches it (the other network answers 401). Publishable `lum_pub_…` keys work only on the routes marked "Publishable keys allowed", from an allowed browser origin. - **Headers.** Every response except `GET /readyz` carries X-Request-Id; authenticated responses carry RateLimit-Limit, RateLimit-Remaining and RateLimit-Reset; 429 and 503 carry Retry-After. - **Errors.** JSON with a machine-readable code (see [errors](/guides/errors)). A path with an empty, `.` or `..` segment answers 400 invalid_request, a trailing slash answers 404 not_found, and a method the path does not accept answers 405 with an Allow header. - **CORS.** Browser calls (CORS) are allowed from https://docs.lumeus.dev (the Try it playground of this reference) and https://app.lumeus.dev only, without cookies; responses expose ETag, Link, Location, Retry-After, X-Request-Id, X-Lumeus-Operation-Id, X-Lumeus-Idempotency and RateLimit-Limit, RateLimit-Remaining and RateLimit-Reset (errors included). Other websites cannot read responses made with a server key: use a publishable key with your own allowed origins ([browser keys](/guides/browser-keys)). license: name: Lumeus API contract servers: - url: https://assets-testnet.lumeus.dev description: Testnet (default) - url: https://assets.lumeus.dev description: Mainnet security: - Bearer: [] tags: - name: Holdings description: >- Every balance an address holds: XLM, trustlines, liquidity pool shares and contract token balances, live or at a past ledger. - name: Account state description: Claimable balances, open DEX offers and token allowances of an address. - name: Tokens description: >- The token registry (identity, metadata, flags, supply) and the ranked holders of each token. - name: Snapshots description: >- Background jobs that compute holdings or holders at any past ledger, including before the balance history begins. - name: Health description: Liveness and readiness probes for monitoring. No authentication. paths: /readyz: get: tags: - Health summary: Check Assets readiness description: >- Returns `{"ready":true}` while the state index is within 60 ledgers of the network tip, else 503 with `{"ready":false}` and Retry-After 5 (also while it is still bootstrapping). Data routes answer 503 with Retry-After in that state. No authentication. operationId: checkAssetsReadiness responses: '200': description: 'Ready: the data is current.' content: application/json: schema: $ref: '#/components/schemas/Readiness' example: ready: true '503': $ref: '#/components/responses/HTTP503_6' security: [] x-codeSamples: - lang: bash label: cURL source: curl --fail-with-body -sS 'https://assets-testnet.lumeus.dev/readyz' - lang: javascript label: JavaScript source: >- // Node 18+ (ES module) const res = await fetch('https://assets-testnet.lumeus.dev/readyz', { method: 'GET', }); console.log(res.status, JSON.stringify(await res.json(), null, 2)); - lang: python label: Python source: |- import json import requests res = requests.get( "https://assets-testnet.lumeus.dev/readyz", timeout=30, ) print(res.status_code, json.dumps(res.json(), indent=2)) components: schemas: Readiness: type: object properties: ready: type: boolean required: - ready responses: HTTP503_6: description: Not ready, or catching up with the network. content: application/json: schema: $ref: '#/components/schemas/Readiness' example: ready: false headers: Retry-After: description: Seconds to wait before retrying. schema: type: integer securitySchemes: Bearer: type: http scheme: bearer description: >- Send `Authorization: Bearer `, the same keys as Activity and RPC. Testnet: `lum_test_…`; Mainnet: `lum_live_…`. A key works only on its own network, so pick the server that matches it (the other network answers 401). Publishable `lum_pub_…` keys work only on the routes marked "Publishable keys allowed", from an allowed browser origin. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.