Generate a UUID v4 as the UETR (Unique End-to-end Transaction Reference) at payment initiation and include it in the gpi service level field of the pacs.008 message; this UETR is the immutable tracking key through the entire payment chain
After submission, query the SWIFT gpi Tracker via your bank's gpi API or the SWIFT API platform using the UETR to retrieve the transaction status; the tracker returns a gpi status object with the current processing bank, timestamp, and status code
Interpret the g4C status codes: ACCC (AcceptedCreditSettlementCompleted) means funds have been credited to the beneficiary; ACSP (AcceptedSettlementInProcess) means the payment is in the correspondent chain; RJCT means rejected
For ACSP statuses, the tracker shows each intermediary bank's confirmation timestamp; use this to identify which hop in the chain is causing delays if SLA is breached
Implement an escalation workflow: if the payment does not reach ACCC within your SLA threshold, use the gpi stop-and-recall mechanism (camt.056) to initiate a recall before funds are applied
Known gotchas
Not all banks on a payment route are gpi members; once a payment passes through a non-gpi bank, tracker visibility is lost and status reverts to the last confirmed gpi hop
The UETR must be preserved unchanged by every gpi member bank in the chain; if an intermediary bank strips or alters the UETR, recall and tracking both fail
gpi recall (camt.056) is a request, not a guaranteed reversal; the beneficiary bank may have already credited the account, in which case recovery requires the beneficiary's cooperation
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claude mcp add --transport http waymark https://mcp.waymark.network/mcp