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Documentation Mercari Seller API
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Mercari APIs

Mercari Seller API

Get a public Mercari US seller profile, ratings, follower counts and selling statistics.

POST/v1/mercari/seller
Authenticate every request

Send Authorization: Bearer YOUR_API_KEY. Get an API key →

Parameters

Send these fields in a flat JSON body. Add _run to choose execution options.

Provide at least one of: seller_id; username; url.

urlstringOptional

Public Mercari US seller profile URL. Minimum length: 1. Maximum length: 2000. Format: uri.

usernamestringOptional

Public Mercari username. Minimum length: 1. Maximum length: 2000. Pattern: ^[A-Za-z0-9_.-]+$.

Advanced & compatibility inputs 1
seller_idstringOptional

Mercari seller ID, returned by search or seller listings. Pattern: ^[0-9]+$.

Response

Every response describes a run. Read result once run_status is succeeded.

run_id
The run to track. Keep it when contacting support.
run_status
Queued, running, waiting for sign-in, succeeded, or failed. Check this even after an HTTP 200.
status_url
Poll this URL while the run is pending. Keep the same run instead of starting another request.
result
The endpoint’s returned data. The example is illustrative; actual fields may be empty or unavailable.
error
On failure, inspect its code, message, retryable and action fields.
View the complete output schema
JSON
{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "success",
    "source",
    "query",
    "url",
    "results",
    "count",
    "data",
    "max_results_requested",
    "pagination"
  ],
  "properties": {
    "url": {
      "type": "string"
    },
    "data": {
      "type": "object",
      "required": [
        "id",
        "username",
        "name",
        "url",
        "image_url",
        "description",
        "created_at",
        "listing_count",
        "sold_count",
        "follower_count",
        "following_count",
        "rating_count",
        "rating_average",
        "is_pro_seller",
        "is_fast_shipper",
        "is_fast_responder",
        "cancellation_rate"
      ],
      "properties": {
        "id": {
          "type": "string"
        },
        "url": {
          "type": "string"
        },
        "name": {
          "type": "string"
        },
        "username": {
          "type": [
            "string",
            "null"
          ]
        },
        "image_url": {
          "type": [
            "string",
            "null"
          ]
        },
        "created_at": {
          "type": [
            "string",
            "null"
          ]
        },
        "sold_count": {
          "type": [
            "number",
            "null"
          ]
        },
        "description": {
          "type": [
            "string",
            "null"
          ]
        },
        "rating_count": {
          "type": [
            "number",
            "null"
          ]
        },
        "is_pro_seller": {
          "type": [
            "boolean",
            "null"
          ]
        },
        "listing_count": {
          "type": [
            "number",
            "null"
          ]
        },
        "follower_count": {
          "type": [
            "number",
            "null"
          ]
        },
        "rating_average": {
          "type": [
            "number",
            "null"
          ]
        },
        "following_count": {
          "type": [
            "number",
            "null"
          ]
        },
        "is_fast_shipper": {
          "type": [
            "boolean",
            "null"
          ]
        },
        "cancellation_rate": {
          "type": [
            "number",
            "null"
          ]
        },
        "is_fast_responder": {
          "type": [
            "boolean",
            "null"
          ]
        }
      },
      "additionalProperties": false
    },
    "count": {
      "type": "integer",
      "minimum": 0
    },
    "query": {
      "type": [
        "string",
        "null"
      ]
    },
    "source": {
      "const": "mercari-seller"
    },
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "username",
          "name",
          "url",
          "image_url",
          "description",
          "created_at",
          "listing_count",
          "sold_count",
          "follower_count",
          "following_count",
          "rating_count",
          "rating_average",
          "is_pro_seller",
          "is_fast_shipper",
          "is_fast_responder",
          "cancellation_rate"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "url": {
            "type": "string"
          },
          "name": {
            "type": "string"
          },
          "username": {
            "type": [
              "string",
              "null"
            ]
          },
          "image_url": {
            "type": [
              "string",
              "null"
            ]
          },
          "created_at": {
            "type": [
              "string",
              "null"
            ]
          },
          "sold_count": {
            "type": [
              "number",
              "null"
            ]
          },
          "description": {
            "type": [
              "string",
              "null"
            ]
          },
          "rating_count": {
            "type": [
              "number",
              "null"
            ]
          },
          "is_pro_seller": {
            "type": [
              "boolean",
              "null"
            ]
          },
          "listing_count": {
            "type": [
              "number",
              "null"
            ]
          },
          "follower_count": {
            "type": [
              "number",
              "null"
            ]
          },
          "rating_average": {
            "type": [
              "number",
              "null"
            ]
          },
          "following_count": {
            "type": [
              "number",
              "null"
            ]
          },
          "is_fast_shipper": {
            "type": [
              "boolean",
              "null"
            ]
          },
          "cancellation_rate": {
            "type": [
              "number",
              "null"
            ]
          },
          "is_fast_responder": {
            "type": [
              "boolean",
              "null"
            ]
          }
        },
        "additionalProperties": false
      }
    },
    "success": {
      "const": true
    },
    "pagination": {
      "type": "object",
      "required": [
        "cursor",
        "next_cursor",
        "has_next_page",
        "count",
        "strategy"
      ],
      "properties": {
        "count": {
          "type": "integer",
          "minimum": 0
        },
        "cursor": {
          "type": [
            "string",
            "null"
          ]
        },
        "strategy": {
          "type": "string"
        },
        "next_cursor": {
          "type": [
            "string",
            "null"
          ]
        },
        "has_next_page": {
          "type": "boolean"
        }
      },
      "additionalProperties": false
    },
    "max_results_requested": {
      "type": "integer",
      "maximum": 100,
      "minimum": 1
    }
  },
  "additionalProperties": false
}
View a polled run response
JSON
{
  "run_id": "00000000-0000-4000-8000-000000000001",
  "task_key": "mercari-seller",
  "task_name": "Mercari Seller API",
  "run_status": "succeeded",
  "status_url": "/v1/runs/00000000-0000-4000-8000-000000000001",
  "result": {
    "url": "https://example.com/item-1",
    "data": {
      "id": "id-1",
      "url": "https://example.com/item-1",
      "name": "Stylish Shoreditch Loft with Balcony",
      "username": "Stylish Shoreditch Loft with Balcony",
      "image_url": "https://example.com/item-1",
      "created_at": "2026-06-14T15:30:00Z",
      "sold_count": 1,
      "description": "Sample description 1",
      "rating_count": 4.91,
      "is_pro_seller": true,
      "listing_count": 1,
      "follower_count": 1,
      "rating_average": 4.91,
      "following_count": 1,
      "is_fast_shipper": true,
      "cancellation_rate": 51.5074,
      "is_fast_responder": true
    },
    "count": 1,
    "query": "London",
    "source": "mercari-seller",
    "results": [
      {
        "id": "id-1",
        "url": "https://example.com/item-1",
        "name": "Stylish Shoreditch Loft with Balcony",
        "username": "Stylish Shoreditch Loft with Balcony",
        "image_url": "https://example.com/item-1",
        "created_at": "2026-06-14T15:30:00Z",
        "sold_count": 1,
        "description": "Sample description 1",
        "rating_count": 4.91,
        "is_pro_seller": true,
        "listing_count": 1,
        "follower_count": 1,
        "rating_average": 4.91,
        "following_count": 1,
        "is_fast_shipper": true,
        "cancellation_rate": 51.5074,
        "is_fast_responder": true
      }
    ],
    "success": true,
    "pagination": {
      "count": 1,
      "cursor": "cursor-page-1",
      "strategy": "sample",
      "next_cursor": "cursor-page-1",
      "has_next_page": true
    },
    "max_results_requested": 1
  },
  "error": null
}

Errors & retries

  • 400Fix the fields listed in errors before retrying.
  • 428Connect the requested website account using the returned sign-in link.
  • 429Wait for the duration in Retry-After.
  • 5xxRetry transient failures with backoff. Keep the request ID.

A failed run has its own error inside the response. Retry it only when error.retryable is true.

Validation, pagination and recovery →

More examples

Async request with polling
RUN=$(curl -s -X POST "https://api-ingress-worker-staging.browsable-staging.workers.dev/v1/mercari/seller" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://www.mercari.com/u/jaijuu/"}')

RUN_ID=$(echo "$RUN" | jq -er '.run_id // empty') || { echo "$RUN" >&2; exit 1; }
POLL_DELAY=3

while true; do
  RESULT=$(curl -s -H "Authorization: Bearer YOUR_API_KEY" "https://api-ingress-worker-staging.browsable-staging.workers.dev/v1/runs/$RUN_ID")
  STATUS=$(echo "$RESULT" | jq -r '.run_status')
  if [[ "$STATUS" =~ ^(succeeded|failed|errored|cancelled|canceled|expired)$ ]]; then
    echo "$RESULT"
    break
  fi
  sleep "$(awk "BEGIN { print $POLL_DELAY * (0.9 + ($RANDOM % 21) / 100) }")"
  POLL_DELAY=$((POLL_DELAY < 30 ? POLL_DELAY * 2 : 30))
  [ "$POLL_DELAY" -gt 30 ] && POLL_DELAY=30
done
Wait-for-results request
curl -X POST "https://api-ingress-worker-staging.browsable-staging.workers.dev/v1/mercari/seller" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://www.mercari.com/u/jaijuu/","_run":{"async":false}}'
Canonical & compatibility routes

You can also send the same JSON body to /v1/tasks/mercari-seller/runs.