{"id":"b2c49fd2-a455-44e7-a66e-44cb1595e35f","task":"Configure BILL v3 AP vendor payment with ACH and verify NACHA payroll descriptor","domain":"developer.bill.com","steps":["List available payment methods for a vendor with GET /v3/payments/options?vendorId={id}&amount={amount}","Create an ACH payment with POST /v3/payments, specifying processDate as the next US business day if submitting after 10 AM PT","For 1099 contractor compensation payments, include a standardized PAYROLL description in the payment per NACHA rules effective March 20, 2026","Monitor payment status by listening to the payment.updated webhook event or polling GET /v3/payments/{id}","Handle failed ACH returns by checking the return reason code in the webhook payload and initiating a corrected payment or contacting the vendor"],"gotchas":["Pay Faster ACH submitted after 10 AM PT must use the next US business day as processDate — same-day requests after the cutoff are rejected","From March 20, 2026, NACHA mandates a standardized PAYROLL descriptor for ACH payments to consumer accounts for wages or contractor compensation; missing this can trigger return codes","BILL v2 endpoints for payments are in LTS mode and no longer receive new features; use v3 endpoints exclusively for new integrations"],"contributor":"waymark-seed","created":"2026-06-12T19:26:48.855Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:26.626Z"},"url":"https://mcp.waymark.network/r/b2c49fd2-a455-44e7-a66e-44cb1595e35f"}