> ## Documentation Index > Fetch the complete documentation index at: https://docs.blockline.sh/llms.txt > Use this file to discover all available pages before exploring further. # Analyze Account Write Locks > Analyze write lock patterns for a specific Solana account, showing timeline of write locks, conflict events, competing transactions, and hot scores. Queries can take 2-5 minutes for large time ranges. No caching - queries run fresh against ClickHouse. Requires one of three query modes: time_range, slot, or start_date/end_date. ## OpenAPI ````yaml /api-reference/openapi.json post /api/write-locks/account openapi: 3.0.3 info: title: Blockline MEV Analytics API description: >- Professional MEV analytics API for Solana. Analyze transaction context, detect front-running, identify sandwich attacks, and gain competitive intelligence on Solana MEV activity. version: 1.0.0 contact: name: Blockline Support url: https://blockline.soltop.sh servers: - url: https://api.soltop.sh description: Production API security: - ApiKeyAuth: [] tags: - name: Trade Analysis description: Analyze MEV activity and transaction context - name: Transactions description: Transaction details and metadata - name: Wallets description: Wallet transaction history - name: Data Management description: Backfill and data operations - name: MEV Analysis description: >- Sandwich attack detection: scan wallets, check transactions, and profile attackers (async job queue) - name: Write Locks description: Account write lock contention and hot account analysis paths: /api/write-locks/account: post: tags: - Write Locks summary: Analyze Account Write Locks description: >- Analyze write lock patterns for a specific Solana account, showing timeline of write locks, conflict events, competing transactions, and hot scores. Queries can take 2-5 minutes for large time ranges. No caching - queries run fresh against ClickHouse. Requires one of three query modes: time_range, slot, or start_date/end_date. operationId: analyzeAccountWriteLocks requestBody: required: true content: application/json: schema: type: object required: - account properties: account: type: string description: Account address to analyze (base58, 32-44 characters) pattern: ^[1-9A-HJ-NP-Za-km-z]{32,44}$ example: FnmStvzQ27Pm4U8r3M6gPD7mnk6ST6HwraPsoNmYpump time_range: type: string description: >- Query mode 1: Time range (mutually exclusive with slot or start_date/end_date) enum: - 1h - 3h - 6h - 12h - 24h - 48h - 72h example: 24h slot: type: integer description: >- Query mode 2: Specific slot number (mutually exclusive with time_range or start_date/end_date) minimum: 1 example: 370537741 start_date: type: integer description: >- Query mode 3: Start of custom date range - Unix timestamp in seconds (requires end_date, mutually exclusive with time_range or slot, max 7 days) minimum: 1 example: 1729368000 end_date: type: integer description: >- Query mode 3: End of custom date range - Unix timestamp in seconds (requires start_date, max 7 days range) minimum: 1 example: 1729454400 responses: '200': description: Account write lock analysis results content: application/json: schema: type: object properties: success: type: boolean example: true data: type: object properties: account: type: string example: FnmStvzQ27Pm4U8r3M6gPD7mnk6ST6HwraPsoNmYpump query_mode: type: string enum: - time_range - slot - custom_date example: time_range query_value: type: string example: 24h slot_range: type: object properties: min: type: integer example: 370500000 max: type: integer example: 370537741 summary: type: object properties: total_write_locks: type: integer description: Total write lock count example: 1250 total_conflicts: type: integer description: Total conflict events example: 45 unique_signers: type: integer description: Number of unique wallets accessing the account example: 23 avg_locks_per_slot: type: number description: Average write locks per slot example: 2.5 hottest_slot: type: integer nullable: true description: Slot with most write locks example: 370520145 hottest_slot_locks: type: integer nullable: true description: Lock count in hottest slot example: 15 hot_score: type: number description: Calculated hot score (0-10) example: 7.8 write_locks_timeline: type: array description: Time series of write lock counts per slot items: type: object properties: slot: type: integer example: 370537741 write_locks: type: integer example: 12 timestamp: type: string format: date-time example: '2025-10-01T19:22:33Z' conflict_timeline: type: array description: Time series of conflict events per slot items: type: object properties: slot: type: integer example: 370537741 conflict_events: type: integer example: 3 timestamp: type: string format: date-time example: '2025-10-01T19:22:33Z' competing_transactions: type: array description: Up to 100 most recent competing transactions items: type: object properties: signature: type: string example: >- 5Pj5fCupXLUePYn18JkY8SrRaWFiUctuDTRwvUy2ML9yvkENLb1QMYbcBGcBXRrSVDjp7RjUwk9a3rLC6gpvtYpZ slot: type: integer example: 370537741 signer: type: string example: HwraPsoNmYpumpFnmStvzQ27Pm4U8r3M6gPD7mnk6ST6 timestamp: type: string format: date-time example: '2025-10-02T15:30:45.123Z' '400': description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/Error' examples: missing_account: value: error: Missing account details: account field is required timestamp: '2025-10-02T15:30:45.123Z' conflicting_params: value: error: Invalid parameters details: >- Must provide exactly one of: time_range, slot, or start_date/end_date timestamp: '2025-10-02T15:30:45.123Z' date_range_too_large: value: error: Invalid date range details: Date range cannot exceed 7 days timestamp: '2025-10-02T15:30:45.123Z' '401': $ref: 02ca5649-c9d9-4a5e-8f26-a133d5c61cc5 '403': $ref: 80776eac-c595-4f19-9646-9d6dc9a6cf2c '429': $ref: cfbde83c-0b04-46b0-b46a-c3a713982079 security: - SupabaseJWT: [] components: schemas: Error: type: object properties: error: type: string description: Error message details: oneOf: - type: string - type: array items: type: string description: Detailed error information timestamp: type: string format: date-time description: When the error occurred securitySchemes: ApiKeyAuth: type: http scheme: bearer bearerFormat: API Key description: >- API Key authentication. Format: `sk_live_xxx` (production) or `sk_test_xxx` (testing). Obtain your API key from the [Blockline Dashboard](https://blockline.soltop.sh/dashboard/api-keys). SupabaseJWT: type: http scheme: bearer bearerFormat: JWT description: >- Supabase JWT authentication. Used for MEV Analysis and Write Locks endpoints. Requires an active subscription (trial, active, or grace_period status). ````