Bump P2A anchors.
Pay with Lightning.

CPFP fee-bump transactions that have Pay-to-Anchor outputs. We spend the anyone-can-spend anchor — no private keys needed.

P2A (BIP 433) CPFP Lightning Network Open source
Does my transaction have a P2A anchor? P2A outputs are added by wallets and LN implementations that support BIP 433. If your transaction doesn't have one, this service can't help — we need the anyone-can-spend anchor output to build the CPFP child.

Get a bump quote

Step 1 of 4

Bump Quote

Step 1 of 4
Current fee rate 2 sat/vB
Target fee rate 12 sat/vB
Service fee (5%) 179 sats
Total 3,749 sats
Parent tx size 225 vB
CPFP child size ~110 vB
P2A anchor output vout:2
Fee deficit to cover 3,570 sats

Quote valid for 5 minutes. Price may change with fee market.

Pay Invoice

Step 2 of 4
lnbc...
Click to copy invoice
Waiting for payment...

Hold invoice — auto-refunds if the bump fails.

Broadcasting

Step 3 of 4
Building CPFP child...
Spending P2A anchor output and broadcasting package to the network.
This usually takes a few seconds

Bump Complete

Step 4 of 4
✓
Transaction bumped
CPFP child broadcast successfully. Your transaction should confirm within your target window.
Parent txid a1b2c3d4...e5f6
CPFP child txid f6e5d4c3...b2a1
Effective fee rate 12.1 sat/vB
Paid 3,749 sats

Can't bump this transaction

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No P2A anchor output found
This transaction doesn't have a Pay-to-Anchor (BIP 433) output. We can only CPFP fee-bump transactions that include an anyone-can-spend P2A anchor output.

Check bump status

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P2A Anchors

We spend the anyone-can-spend anchor output (BIP 433) attached to your transaction. No keys needed, no custody involved.

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Lightning Payments

Pay with Lightning for instant settlement. Hold invoices auto-refund if the bump fails. No on-chain deposit needed.

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Open Source

Every bump creates a verifiable on-chain CPFP child. Full source code available. Don't trust, verify.