{"service":"TCGA Analysis API","version":"0.1.0","endpoints":{"/api/v1/cancers":"List all available cancer types with sample counts","/api/v1/diff-expr":"Differential expression analysis (gene + cancer)","/api/v1/corr":"Spearman correlation between two genes in primary tumors","/api/v1/survival":"Survival analysis: gene expression vs survival (log-rank)"},"docs":"/docs"}