StableShipping
API enables purchasing US domestic shipping labels and tracking via EasyPost, accepting x402 micropayments.
Trust signal
4 of 4 pillars
coverage 100%
Pillars
Signals
Evidence tiers, not an endorsement · trust model v0.1.0 (provisional) · CDP-lane settlement only (D3) · Trust API coming soon
On-chain traction
ERC-8004 agent registry
Not found in the ERC-8004 agent registry. This is the default state — absence is not a negative signal.
Identity & classification
Settlement volume
USDC settled on-chain · monthly
as of Jul 12, 2026
Endpoints(6)
List labels purchased by the signing wallet.
Prepare a label purchase intent from a quoted EasyPost rate. Validates quote_id, rate_id, and expected carrier/service/amount/currency before any payment is requested.
Retrieve a stored shipping label by local label ID or provider transaction/tracker ID. Requires the wallet that bought the label.
Create a US domestic EasyPost shipment and return available rates. Requires SIWX so the quote is stored for the signing wallet.
Compatibility alias for POST /api/quote. Use this endpoint to get shipping rates for a US domestic EasyPost shipment.
Refresh tracking for a purchased label by local label ID or provider transaction/tracker ID. Requires the wallet that bought the label.