Handling HTTP 429 and Retry-After in API Clients
Respond to API rate limits with bounded waits, shared concurrency control and explicit request budgets, without creating a retry storm.
Read the guideIndexbase journal / ideas for builders
Blockchain data.
Worth understanding.
Practical guides to blockchain APIs, wallet data and the evidence behind a useful answer. Clear concepts, worked examples and better questions for your next integration.
Follow the article feed200 articles / page 10 of 13
Explore all guides
In-depth introductions and focused field guides, organised around practical questions.
Timeouts and Cancellation in Blockchain API Clients
Set request deadlines, propagate cancellation and distinguish an unknown outcome from a confirmed failure when an API connection ends unexpectedly.
Read the guideExponential Backoff and Jitter for API Reads
Design bounded retry delays with jitter, classify retryable failures and avoid synchronised request bursts across blockchain data workers.
Read the guideVerifying Webhook Signatures Before Processing Events
Verify webhook authenticity using the documented signature scheme, original request bytes and replay controls before accepting data into a workflow.
Read the guideWebhooks Plus Polling: Closing Delivery Gaps
Combine low-latency webhook delivery with bounded range reconciliation, preserving event identities and avoiding duplicate activity across the two paths.
Read the guideIdempotency Keys for Blockchain Data Imports
Make repeated import requests safe by scoping idempotency keys to an operation and payload, while keeping request identity separate from event deduplication.
Read the guideBackward-Compatible Blockchain API Schema Changes
Evolve API responses without breaking older clients, including optional fields, unknown enums, nullable values and exact quantity representations.
Read the guideAPI Errors vs Empty Blockchain Query Results
Distinguish a successful query with no matching records from unavailable data, authentication failures and partial responses in blockchain integrations.
Read the guideCache Keys for Blockchain API Responses
Build cache keys from network, method, asset, wallet and state context, and avoid serving latest-state results for historical or differently authorised queries.
Read the guide
Server-Side API Configuration with Environment Variables
Configure blockchain API access on the server with explicit network and endpoint settings, while preventing credentials from entering browser bundles or logs.
Read the guide
Rotating Blockchain API Keys Without Losing Control
Plan API key rotation with explicit ownership, overlap limits and revocation checks, while keeping credentials out of logs and public client code.
Read the guideEstimating API Credits for Data Queries
Estimate query cost from documented operation rules, pagination and request budgets, while keeping a cost estimate separate from actual metered usage.
Read the guideConnection Tests vs Wallet Imports in API Integrations
Design a minimal access check that validates configuration without silently fetching wallet history, reserving a large budget or starting an import.
Read the guideObservability for Blockchain API Integrations
Monitor latency, coverage, retries and interpretation failures with safe metrics, without leaking API keys or wallet-linked payloads into routine logs.
Read the guide
Avoiding Double Counts in Blockchain SQL Joins
Join transactions, transfers and prices without multiplying rows, and verify aggregation grain before trusting wallet or market totals.
Read the guideWindow Functions for Blockchain Activity Analysis
Use SQL window functions for running totals and ordered comparisons while preserving event grain, exact quantities and deterministic ordering.
Read the guideThe editorial approach
Useful questions.
Traceable explanations.
Each guide starts with a concrete developer question and separates technical observations from the interpretation an application adds. Worked examples use illustrative values; references point to standards and technical documentation.
Published by Indexbase. Explore related guides as your requirements develop, from a first data question to a more deliberate integration workflow.