reference-data

get_series_history

Read-onlyIdempotent

PAID ($0.005). Historical values of a reference series with effective date ranges, optionally filtered by from/to (YYYY-MM-DD). Pass api_key if you have one (instant card checkout at /pricing); otherwise the response explains how to pay via x402. Every AE series is free to try. After a 200, bind get_changes (free poll) or register_alert (HMAC push; Register: $0 · Delivery after trial: $0.10) on this series so a later gazette does not silently retire the value.

Input Schema

TableJSON Schema

Name	Required	Description
`to`	No	Latest effective date, YYYY-MM-DD
`from`	No	Earliest effective date, YYYY-MM-DD
`series`	Yes	Series id
`api_key`	No	API key
`country`	Yes	ISO country code

Output Schema

TableJSON Schema

Name	Required	Description
`error`	No	Present on a free refusal or error; no charge
`stale`	No
`series`	No
`country`	No
`entries`	No
`no_charge`	No
`price_usd`	No
`disclaimer`	No
`how_to_pay`	No
`bind_series`	No
`explanation`	No
`label_basis`	No	Inputs and the rule ids that produced the two labels
`x_next_bind`	No
`http_endpoint`	No
`coverage_label`	No	How much of the question is covered: ready = complete; partial = held with a disclosed limitation or default; gap = no number served. Rules at /label-rules
`confidence_label`	No	Evidence verdict derived from source type, verification age and the stale flag (answers: the weakest series read). Rules at /label-rules
`payment_required`	No	true when the call needs payment; how_to_pay explains x402 or card

Schema Changelog

Changes observed during successful MCP inspections.

Changed7 schema fields changedOct 13, 2026

changedOutput schema / description

Previous value: -"Historical entries of one series"New value: +"Historical entries of one series; top-level labels describe the current value, and each entry carries its own"

addedOutput schema / properties / confidence_label

Added value: +{
+  "description": "Evidence verdict derived from source type, verification age and the stale flag (answers: the weakest series read). Rules at /label-rules",
+  "enum": [
+    "high",
+    "medium",
+    "low"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / coverage_label

Added value: +{
+  "description": "How much of the question is covered: ready = complete; partial = held with a disclosed limitation or default; gap = no number served. Rules at /label-rules",
+  "enum": [
+    "ready",
+    "partial",
+    "gap"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / entries / items / additionalProperties
```
Added value: +{}
```

addedOutput schema / properties / entries / items / properties

Added value: +{
+  "confidence": {},
+  "confidence_label": {
+    "description": "Evidence verdict derived from source type, verification age and the stale flag (answers: the weakest series read). Rules at /label-rules",
+    "enum": [
+      "high",
+      "medium",
+      "low"
+    ],
+    "type": "string"
+  },
+  "country": {
+    "type": "string"
+  },
+  "coverage_label": {
+    "description": "How much of the question is covered: ready = complete; partial = held with a disclosed limitation or default; gap = no number served. Rules at /label-rules",
+    "enum": [
+      "ready",
+      "partial",
+      "gap"
+    ],
+    "type": "string"
+  },
+  "effective_from": {},
+  "label_basis": {
+    "additionalProperties": {},
+    "description": "Inputs and the rule ids that produced the two labels",
+    "properties": {
+      "confidence_reasons": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "coverage_reasons": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "inputs": {
+        "items": {},
+        "type": "array"
+      },
+      "rules": {
+        "type": "string"
+      },
+      "rules_version": {
+        "type": "string"
+      },
+      "source_type": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "stale": {
+        "type": "boolean"
+      },
+      "verification_age_days": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "type": "object"
+  },
+  "last_confirmed": {},
+  "notes": {},
+  "series": {
+    "type": "string"
+  },
+  "source": {},
+  "stale": {
+    "type": "boolean"
+  },
+  "unit": {},
+  "value": {}
+}

addedOutput schema / properties / entries / items / type
```
Added value: +"object"
```

addedOutput schema / properties / label_basis

Added value: +{
+  "additionalProperties": {},
+  "description": "Inputs and the rule ids that produced the two labels",
+  "properties": {
+    "confidence_reasons": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "coverage_reasons": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "inputs": {
+      "items": {},
+      "type": "array"
+    },
+    "rules": {
+      "type": "string"
+    },
+    "rules_version": {
+      "type": "string"
+    },
+    "source_type": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "stale": {
+      "type": "boolean"
+    },
+    "verification_age_days": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "type": "object"
+}

Changed1 schema field changedOct 12, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": {},
+  "description": "Historical entries of one series",
+  "properties": {
+    "bind_series": {},
+    "country": {
+      "type": "string"
+    },
+    "disclaimer": {},
+    "entries": {
+      "items": {},
+      "type": "array"
+    },
+    "error": {
+      "description": "Present on a free refusal or error; no charge"
+    },
+    "explanation": {},
+    "how_to_pay": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "http_endpoint": {
+      "type": "string"
+    },
+    "no_charge": {
+      "type": "boolean"
+    },
+    "payment_required": {
+      "description": "true when the call needs payment; how_to_pay explains x402 or card",
+      "type": "boolean"
+    },
+    "price_usd": {
+      "type": "number"
+    },
+    "series": {
+      "type": "string"
+    },
+    "stale": {
+      "type": "boolean"
+    },
+    "x_next_bind": {}
+  },
+  "type": "object"
+}

First observedJul 24, 2026

TDQS

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