Toll-like receptors (TLRs) are essential sentinels of innate immunity that detect pathogen-associated molecular patterns (PAMPs) and initiate downstream signaling cascades. Central to these pathways is the adaptor protein myeloid differentiation primary response 88 (MyD88), which functions as a pivotal hub coordinating early immune responses. Despite its importance, the temporal dynamics of MyD88-dependent signaling in response to distinct TLR agonists remain incompletely defined. In this study, we employed a systematic approach to dissect agonist-specific modulation of the MyD88 signaling niche in macrophages. Using a panel of canonical TLR ligands—lipopolysaccharide (LPS, TLR4), Pam3CysSerLys4 (P3C, TLR2/1), resiquimod (R848, TLR7/8), and polyinosinic-polycytidylic acid (poly(I:C), TLR3)—we demonstrate that different agonists drive unique temporal patterns of MyD88 engagement, resulting in distinct transcriptional programs and post-translational modifications. These findings reveal that MyD88 operates as a dynamic regulatory node whose functional output is shaped by the identity of the upstream agonist, thereby fine-tuning the magnitude and kinetics of innate immune activation.