UDS Toolbox
Find why a UDS flash failed from a CAN trace; decode UDS, ISO-TP and DTCs. No hardware.
Connect it
Settings → Connectors → Add custom connector
URL: https://mcp.udslib.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://mcp.udslib.com/mcp{
"mcpServers": {
"uds-toolbox": {
"url": "https://mcp.udslib.com/mcp"
}
}
}claude mcp add --transport http uds-toolbox https://mcp.udslib.com/mcp{
"servers": {
"uds-toolbox": {
"type": "http",
"url": "https://mcp.udslib.com/mcp"
}
}
}7 tools, verified live
analyze_traceread-onlyAnalyze a whole CAN trace of a UDS diagnostic or flash session and say what went wrong. Accepts candump logs, Vector ASC, PEAK TRC (1.x/2.x), SavvyCAN or python-can CSV pasted as text, and those plus Vector BLF, Wireshark pcap/pcapng (SocketCAN) and ASAM MF4 bus logging uploaded as a file. Reassembles ISO-TP, pairs requests with responses (including 0x78 responsePending), measures P2/P2*, follows
decode_udsread-onlyDecode a UDS (ISO 14229-1) PDU from hex: request, positive or negative response. Names the service, sub-function (and suppressPosRsp bit), DID/RID/address fields, and for negative responses the NRC with meaning and typical cause. Unknown SIDs and NRCs are labelled, not rejected.
build_uds_requestread-onlyBuild a UDS request as hex with an annotated breakdown. Services: session, ecu_reset, read_did, write_did, security_seed, security_key, tester_present, routine, request_download, transfer_data, transfer_exit, clear_dtc, read_dtc, control_dtc, comm_control, raw. Numeric strings are hex.
decode_isotpread-onlyReassemble ISO-TP (ISO 15765-2) messages from CAN frames, per CAN id, and decode each as UDS. Reports frame types (SF/FF/CF/FC), flow-control BS/STmin, sequence-number errors, interrupted messages, padding, and N_Bs/N_Cr/STmin timing warnings when timestamps (ms) are given. Accepts a frame list or a candump text dump.
decode_dtcread-onlyConvert a 3-byte UDS DTC to the SAE J2012 style code (P/C/B/U + digits) plus failure type byte, or the reverse ("U0073-00" to hex). With a status byte, explains each of the 8 DTC status bits.
uds_referenceread-onlyShort UDS reference with ISO 14229-1 clause pointers (paraphrased). Topics: a service ID (0x27) or name, an NRC (0x78 or "nrc 78"), a DID (F190) or RID (FF00), timing (p2, p2*, s3), sessions, security (0x27 vs 0x29), reprogramming_sequence. Unknown topics return a topic list.
udslib_integrationread-onlyPlan how to integrate the UDSLib C stack (ISO 14229 UDS server/client for embedded ECUs): which repo files to take, Kconfig/config hints, an init skeleton, the closest example, and the license terms (free noncommercial / commercial). UDSLib speaks ISO-TP over CAN/CAN-FD; DoIP is not supported.
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