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Every FIX message must include a standard header and trailer. The header contains essential routing and sequence information, while the trailer provides message integrity verification.
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string
required
FIX.4.4. Must be the first field in the message.
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integer
required
Must be the second field in the message.
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string
required
Must be the third field in the message.
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string
required
Provided by Customer during onboarding.
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string
required
Provided by Customer during onboarding.
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integer
required
Message sequence number.
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boolean
Always required for retransmitted messages, whether prompted by the sending system or as the result of a resend request.
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boolean
Required when the message may be duplicate of another message sent under a different sequence number.
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string
Time of message transmission expressed in UTC. Format: YYYYMMDD-HH:MM:SS.uuu (required).
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string
Required for message re-sent as a result of a ResendRequest. If data is not available set to same value as SendingTime (52). Format: YYYYMMDD-HH:MM:SS.uuu
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string
required
Three byte, simple checksum. See the FIX spec for details.