Abstract: In some aspects, provided herein are antibodies or antigen-binding fragments that bind to CD200R, a glycoprotein receptor present on cell surfaces. Antibodies or antigen-binding fragments provided herein, in some cases, agonize CD200R signaling pathway that inhibits inflammation and immune response. In other aspects, provided herein are compositions, methods of use, methods of making, polynucleotides, vectors, host cells, and kits relating to antibodies or antigen-binding fragments that bind to CD200R.