What to send support when a swap fails
Prepare a precise swap failure report with public transaction details while excluding secrets and actionable signatures.
The reference
All swap guides
Browse 484 guides to DEX aggregation, BNB Chain, swap execution and integration.
Why copying a failed swap transaction can fail again
Why replaying an old swap’s transaction data can preserve the same deadline, route and amount conditions that already failed.
Why did my swap return a wrapped token instead of native coin?
Check whether the output is a wrapped token balance before treating native-coin output as missing.
Why does a token ask for a zero approval before a new allowance?
Why some token allowance changes require setting the existing allowance to zero before authorizing a new amount.
Why does the same aggregator keep asking me to approve?
Find out why a familiar aggregator requests approval again and distinguish legitimate scope changes from suspicious requests.
Why one pending transaction blocks later swaps
Find the earliest unresolved account transaction when later swaps remain queued behind it.
Why swapping the full native-coin balance can fail
Leave room for execution costs when spending the same native coin used to pay network fees.
Will resetting wallet transaction history fix a stuck swap?
Understand why clearing local activity may fix a display issue but cannot cancel or reverse blockchain transactions.
0x API keys and rate plans: what to check before launch
Check 0x onboarding and request capacity before launching a swap app; distinguish application keys from purchased throughput.
0x API pricing: platform fees and integration economics
0x Standard publishes 0.15% transaction fees with product-specific conditions, separate from gas, integrator fees and commercial account terms.
0x explained: trading infrastructure behind an interface
Understand 0x as trading infrastructure and separate the API provider, the app that uses it and the contracts executing a swap.
0x Swap or Gasless API: choosing the product
Choose between 0x Swap and Gasless products by asset eligibility, approval setup and who bears execution cost.
1inch API pricing: subscription, quota and swap fee
Budget a 1inch integration across subscription access, monthly call capacity, request limits and swap infrastructure charges.
1inch Classic or Fusion: which execution mode fits?
Compare 1inch Classic and Fusion by who submits execution, how gas is handled and what an unfilled order means.
1inch explained: the app, protocols and API business
Identify the 1inch product you are using: swap interface, execution protocol, self-custody wallet or commercial API service.
1inch infrastructure fees: why API access is not the whole cost
Read the current 1inch swap infrastructure fee table and understand why those charges differ from API subscriptions and network gas.
1inch x402 versus an API subscription
Compare 1inch pay-per-call x402 access with subscriptions, including the payment network, verification and temporary fee terms.
Choosing a 1inch API plan by traffic pattern
Size a 1inch API plan using monthly consumption and peak traffic, with a worked example that separates the two constraints.
CoW Swap explained: orders, solvers and batch auctions
Understand CoW Swap as an interface over a solver-based protocol, with order tracking and cancellation distinct from ordinary transactions.
CoW Swap market, limit and time-based orders
Compare CoW Swap market, limit and TWAP orders using their execution conditions, wallet requirements and monitoring needs.
Does the 1inch API require KYC or KYB?
Check which 1inch Business actions require verification and distinguish API organization onboarding from a retail swap.
Jupiter swap products: read the current interface and API scope
Jupiter Spot is a Solana trading product. Its modes and fee schedules are useful comparative context, not evidence of BNB Smart Chain execution.
KyberSwap Aggregator: scope and trade review
Separate KyberSwap aggregation from its limit-order, cross-chain and liquidity-management products before comparing a trade.
KyberSwap API access and commercial limits
Check KyberSwap gateway keys, client identifiers and negotiated capacity without borrowing limits from unrelated Kyber products.
KyberSwap fees: distinguish the swap from the product
Avoid mixing KyberSwap pool, swap, cross-chain and integrator fees; inspect the product and route where a charge applies.
KyberSwap limit orders versus an immediate swap
Compare KyberSwap limit orders with immediate swaps and understand the conditions that matter before leaving an order active.
KyberSwap liquidity-source controls: when to change them
Understand how excluding KyberSwap liquidity sources changes a quote and why filtering does not certify the remaining route.
Matcha and 0x: frontend versus infrastructure
Matcha Auto, Standard, limit orders and cross-chain swaps have different fee and gas treatment. Compare the current products rather than an old zero-fee slogan.
Odos shut down: current service status and older documentation
Odos trading and hosted APIs ended in July 2026. Understand why old pricing pages and deployed contracts do not prove active service.
OKX Aggregator+: routing quotes and intent execution
Read OKX Aggregator+ intent selection, supported networks and cancellation conditions before relying on a solver-filled trade.
